Home / 90,909.61-136,382.91-38,319.01

Finding the Fourth Proportional to 90,909.61, 136,382.91 and 38,319.01

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Solution

The fourth proportional to 90,909.61, 136,382.91 and 38,319.01 is: 57,486.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,909.61 : 136,382.91 = 38,319.01 : x
  2. Step 2: Convert to fraction form
    90,909.61/136,382.91 = 38,319.01/x
  3. Step 3: Cross multiply
    90,909.61x = 136,382.91 × 38,319.01
  4. Step 4: Simplify right side
    90,909.61x = 5,226,058,092.12
  5. Step 5: Solve for x
    x = 5,226,058,092.12/90,909.61
  6. Step 6: Final answer
    x = 57,486.31

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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.