Home / 115,678.38-159,635.04-64,690.53

Finding the Fourth Proportional to 115,678.38, 159,635.04 and 64,690.53

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Solution

The fourth proportional to 115,678.38, 159,635.04 and 64,690.53 is: 89,272.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,678.38 : 159,635.04 = 64,690.53 : x
  2. Step 2: Convert to fraction form
    115,678.38/159,635.04 = 64,690.53/x
  3. Step 3: Cross multiply
    115,678.38x = 159,635.04 × 64,690.53
  4. Step 4: Simplify right side
    115,678.38x = 10,326,875,344.17
  5. Step 5: Solve for x
    x = 10,326,875,344.17/115,678.38
  6. Step 6: Final answer
    x = 89,272.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.