Home / 287,985.57-431,929.13-77,574.30

Finding the Fourth Proportional to 287,985.57, 431,929.13 and 77,574.30

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Solution

The fourth proportional to 287,985.57, 431,929.13 and 77,574.30 is: 116,348.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,985.57 : 431,929.13 = 77,574.30 : x
  2. Step 2: Convert to fraction form
    287,985.57/431,929.13 = 77,574.30/x
  3. Step 3: Cross multiply
    287,985.57x = 431,929.13 × 77,574.30
  4. Step 4: Simplify right side
    287,985.57x = 33,506,599,909.36
  5. Step 5: Solve for x
    x = 33,506,599,909.36/287,985.57
  6. Step 6: Final answer
    x = 116,348.19

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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.