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Finding the Fourth Proportional to 90,428.95, 124,766.49 and 71,249.26

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Solution

The fourth proportional to 90,428.95, 124,766.49 and 71,249.26 is: 98,303.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428.95 : 124,766.49 = 71,249.26 : x
  2. Step 2: Convert to fraction form
    90,428.95/124,766.49 = 71,249.26/x
  3. Step 3: Cross multiply
    90,428.95x = 124,766.49 × 71,249.26
  4. Step 4: Simplify right side
    90,428.95x = 8,889,520,274.50
  5. Step 5: Solve for x
    x = 8,889,520,274.50/90,428.95
  6. Step 6: Final answer
    x = 98,303.92

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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.