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Finding the Fourth Proportional to 287,901.76, 431,851.92 and 77,539.92

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Solution

The fourth proportional to 287,901.76, 431,851.92 and 77,539.92 is: 116,309.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,901.76 : 431,851.92 = 77,539.92 : x
  2. Step 2: Convert to fraction form
    287,901.76/431,851.92 = 77,539.92/x
  3. Step 3: Cross multiply
    287,901.76x = 431,851.92 × 77,539.92
  4. Step 4: Simplify right side
    287,901.76x = 33,485,763,328.65
  5. Step 5: Solve for x
    x = 33,485,763,328.65/287,901.76
  6. Step 6: Final answer
    x = 116,309.69

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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.