Home / 287,515.90-431,357.15-119,005.12

Finding the Fourth Proportional to 287,515.90, 431,357.15 and 119,005.12

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Solution

The fourth proportional to 287,515.90, 431,357.15 and 119,005.12 is: 178,542.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,515.90 : 431,357.15 = 119,005.12 : x
  2. Step 2: Convert to fraction form
    287,515.90/431,357.15 = 119,005.12/x
  3. Step 3: Cross multiply
    287,515.90x = 431,357.15 × 119,005.12
  4. Step 4: Simplify right side
    287,515.90x = 51,333,709,398.61
  5. Step 5: Solve for x
    x = 51,333,709,398.61/287,515.90
  6. Step 6: Final answer
    x = 178,542.16

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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.