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Finding the Fourth Proportional to 157,158.28, 216,879.32 and 85,538.13

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Solution

The fourth proportional to 157,158.28, 216,879.32 and 85,538.13 is: 118,043.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,158.28 : 216,879.32 = 85,538.13 : x
  2. Step 2: Convert to fraction form
    157,158.28/216,879.32 = 85,538.13/x
  3. Step 3: Cross multiply
    157,158.28x = 216,879.32 × 85,538.13
  4. Step 4: Simplify right side
    157,158.28x = 18,551,450,869.02
  5. Step 5: Solve for x
    x = 18,551,450,869.02/157,158.28
  6. Step 6: Final answer
    x = 118,043.11

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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.