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Finding the Fourth Proportional to 65,658.78, 90,605.39 and 38,803.79

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Solution

The fourth proportional to 65,658.78, 90,605.39 and 38,803.79 is: 53,547.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,658.78 : 90,605.39 = 38,803.79 : x
  2. Step 2: Convert to fraction form
    65,658.78/90,605.39 = 38,803.79/x
  3. Step 3: Cross multiply
    65,658.78x = 90,605.39 × 38,803.79
  4. Step 4: Simplify right side
    65,658.78x = 3,515,832,526.43
  5. Step 5: Solve for x
    x = 3,515,832,526.43/65,658.78
  6. Step 6: Final answer
    x = 53,547.03

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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.