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Finding the Fourth Proportional to 308,036.18, 425,088.12 and 172,069.71

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Solution

The fourth proportional to 308,036.18, 425,088.12 and 172,069.71 is: 237,455.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,036.18 : 425,088.12 = 172,069.71 : x
  2. Step 2: Convert to fraction form
    308,036.18/425,088.12 = 172,069.71/x
  3. Step 3: Cross multiply
    308,036.18x = 425,088.12 × 172,069.71
  4. Step 4: Simplify right side
    308,036.18x = 73,144,789,532.85
  5. Step 5: Solve for x
    x = 73,144,789,532.85/308,036.18
  6. Step 6: Final answer
    x = 237,455.19

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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.