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Finding the Fourth Proportional to 60,474.80, 90,712.20 and 18,916.40

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Solution

The fourth proportional to 60,474.80, 90,712.20 and 18,916.40 is: 28,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,474.80 : 90,712.20 = 18,916.40 : x
  2. Step 2: Convert to fraction form
    60,474.80/90,712.20 = 18,916.40/x
  3. Step 3: Cross multiply
    60,474.80x = 90,712.20 × 18,916.40
  4. Step 4: Simplify right side
    60,474.80x = 1,715,948,260.08
  5. Step 5: Solve for x
    x = 1,715,948,260.08/60,474.80
  6. Step 6: Final answer
    x = 28,374.60

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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.