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Finding the Fourth Proportional to 121,212.20, 181,818.30 and 83,887.40

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Solution

The fourth proportional to 121,212.20, 181,818.30 and 83,887.40 is: 125,831.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,212.20 : 181,818.30 = 83,887.40 : x
  2. Step 2: Convert to fraction form
    121,212.20/181,818.30 = 83,887.40/x
  3. Step 3: Cross multiply
    121,212.20x = 181,818.30 × 83,887.40
  4. Step 4: Simplify right side
    121,212.20x = 15,252,264,459.42
  5. Step 5: Solve for x
    x = 15,252,264,459.42/121,212.20
  6. Step 6: Final answer
    x = 125,831.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.