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Finding the Fourth Proportional to 65,306.68, 90,097.36 and 42,638.44

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Solution

The fourth proportional to 65,306.68, 90,097.36 and 42,638.44 is: 58,824.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,306.68 : 90,097.36 = 42,638.44 : x
  2. Step 2: Convert to fraction form
    65,306.68/90,097.36 = 42,638.44/x
  3. Step 3: Cross multiply
    65,306.68x = 90,097.36 × 42,638.44
  4. Step 4: Simplify right side
    65,306.68x = 3,841,610,878.52
  5. Step 5: Solve for x
    x = 3,841,610,878.52/65,306.68
  6. Step 6: Final answer
    x = 58,824.16

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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.