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Finding the Fourth Proportional to 157,120.86, 216,831.35 and 85,505.50

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Solution

The fourth proportional to 157,120.86, 216,831.35 and 85,505.50 is: 118,000.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,120.86 : 216,831.35 = 85,505.50 : x
  2. Step 2: Convert to fraction form
    157,120.86/216,831.35 = 85,505.50/x
  3. Step 3: Cross multiply
    157,120.86x = 216,831.35 × 85,505.50
  4. Step 4: Simplify right side
    157,120.86x = 18,540,271,485.74
  5. Step 5: Solve for x
    x = 18,540,271,485.74/157,120.86
  6. Step 6: Final answer
    x = 118,000.07

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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.