Home / 287,837.20-431,707.20-77,428.32

Finding the Fourth Proportional to 287,837.20, 431,707.20 and 77,428.32

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Solution

The fourth proportional to 287,837.20, 431,707.20 and 77,428.32 is: 116,129.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,837.20 : 431,707.20 = 77,428.32 : x
  2. Step 2: Convert to fraction form
    287,837.20/431,707.20 = 77,428.32/x
  3. Step 3: Cross multiply
    287,837.20x = 431,707.20 × 77,428.32
  4. Step 4: Simplify right side
    287,837.20x = 33,426,363,227.90
  5. Step 5: Solve for x
    x = 33,426,363,227.90/287,837.20
  6. Step 6: Final answer
    x = 116,129.41

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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.