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Finding the Fourth Proportional to 65,235.52, 90,019.92 and 38,379.04

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Solution

The fourth proportional to 65,235.52, 90,019.92 and 38,379.04 is: 52,960.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,235.52 : 90,019.92 = 38,379.04 : x
  2. Step 2: Convert to fraction form
    65,235.52/90,019.92 = 38,379.04/x
  3. Step 3: Cross multiply
    65,235.52x = 90,019.92 × 38,379.04
  4. Step 4: Simplify right side
    65,235.52x = 3,454,878,110.48
  5. Step 5: Solve for x
    x = 3,454,878,110.48/65,235.52
  6. Step 6: Final answer
    x = 52,960.08

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1.5x scale

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.