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Finding the Fourth Proportional to 65,239.88, 90,048.76 and 38,391.02

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Solution

The fourth proportional to 65,239.88, 90,048.76 and 38,391.02 is: 52,990.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,239.88 : 90,048.76 = 38,391.02 : x
  2. Step 2: Convert to fraction form
    65,239.88/90,048.76 = 38,391.02/x
  3. Step 3: Cross multiply
    65,239.88x = 90,048.76 × 38,391.02
  4. Step 4: Simplify right side
    65,239.88x = 3,457,063,746.14
  5. Step 5: Solve for x
    x = 3,457,063,746.14/65,239.88
  6. Step 6: Final answer
    x = 52,990.04

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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.