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Finding the Fourth Proportional to 99,275.95, 136,866.64 and 67,389.49

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Solution

The fourth proportional to 99,275.95, 136,866.64 and 67,389.49 is: 92,906.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,275.95 : 136,866.64 = 67,389.49 : x
  2. Step 2: Convert to fraction form
    99,275.95/136,866.64 = 67,389.49/x
  3. Step 3: Cross multiply
    99,275.95x = 136,866.64 × 67,389.49
  4. Step 4: Simplify right side
    99,275.95x = 9,223,373,067.61
  5. Step 5: Solve for x
    x = 9,223,373,067.61/99,275.95
  6. Step 6: Final answer
    x = 92,906.42

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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.