Home / 121,990,311.28-168,346,832.52-66,989,652.40

Finding the Fourth Proportional to 121,990,311.28, 168,346,832.52 and 66,989,652.40

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Solution

The fourth proportional to 121,990,311.28, 168,346,832.52 and 66,989,652.40 is: 92,445,831.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,990,311.28 : 168,346,832.52 = 66,989,652.40 : x
  2. Step 2: Convert to fraction form
    121,990,311.28/168,346,832.52 = 66,989,652.40/x
  3. Step 3: Cross multiply
    121,990,311.28x = 168,346,832.52 × 66,989,652.40
  4. Step 4: Simplify right side
    121,990,311.28x = 11,277,495,793,155,816
  5. Step 5: Solve for x
    x = 11,277,495,793,155,816/121,990,311.28
  6. Step 6: Final answer
    x = 92,445,831.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.