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Finding the Fourth Proportional to 287,910.65, 431,929.16 and 88,246.06

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Solution

The fourth proportional to 287,910.65, 431,929.16 and 88,246.06 is: 132,388.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,910.65 : 431,929.16 = 88,246.06 : x
  2. Step 2: Convert to fraction form
    287,910.65/431,929.16 = 88,246.06/x
  3. Step 3: Cross multiply
    287,910.65x = 431,929.16 × 88,246.06
  4. Step 4: Simplify right side
    287,910.65x = 38,116,045,378.98
  5. Step 5: Solve for x
    x = 38,116,045,378.98/287,910.65
  6. Step 6: Final answer
    x = 132,388.45

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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.