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Finding the Fourth Proportional to 60,313.80, 90,470.70 and 20,874.90

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Solution

The fourth proportional to 60,313.80, 90,470.70 and 20,874.90 is: 31,312.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,313.80 : 90,470.70 = 20,874.90 : x
  2. Step 2: Convert to fraction form
    60,313.80/90,470.70 = 20,874.90/x
  3. Step 3: Cross multiply
    60,313.80x = 90,470.70 × 20,874.90
  4. Step 4: Simplify right side
    60,313.80x = 1,888,566,815.43
  5. Step 5: Solve for x
    x = 1,888,566,815.43/60,313.80
  6. Step 6: Final answer
    x = 31,312.35

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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.