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Finding the Fourth Proportional to 66,400.90, 99,658.05 and 26,986.30

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Solution

The fourth proportional to 66,400.90, 99,658.05 and 26,986.30 is: 40,502.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400.90 : 99,658.05 = 26,986.30 : x
  2. Step 2: Convert to fraction form
    66,400.90/99,658.05 = 26,986.30/x
  3. Step 3: Cross multiply
    66,400.90x = 99,658.05 × 26,986.30
  4. Step 4: Simplify right side
    66,400.90x = 2,689,402,034.72
  5. Step 5: Solve for x
    x = 2,689,402,034.72/66,400.90
  6. Step 6: Final answer
    x = 40,502.49

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1.5x scale

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.