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Finding the Fourth Proportional to 312,139.79, 430,753.68 and 168,901.32

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Solution

The fourth proportional to 312,139.79, 430,753.68 and 168,901.32 is: 233,084.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,139.79 : 430,753.68 = 168,901.32 : x
  2. Step 2: Convert to fraction form
    312,139.79/430,753.68 = 168,901.32/x
  3. Step 3: Cross multiply
    312,139.79x = 430,753.68 × 168,901.32
  4. Step 4: Simplify right side
    312,139.79x = 72,754,865,146.86
  5. Step 5: Solve for x
    x = 72,754,865,146.86/312,139.79
  6. Step 6: Final answer
    x = 233,084.24

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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.