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Finding the Fourth Proportional to 139,470.80, 209,088.64 and 60,525.56

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Solution

The fourth proportional to 139,470.80, 209,088.64 and 60,525.56 is: 90,737.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,470.80 : 209,088.64 = 60,525.56 : x
  2. Step 2: Convert to fraction form
    139,470.80/209,088.64 = 60,525.56/x
  3. Step 3: Cross multiply
    139,470.80x = 209,088.64 × 60,525.56
  4. Step 4: Simplify right side
    139,470.80x = 12,655,207,025.64
  5. Step 5: Solve for x
    x = 12,655,207,025.64/139,470.80
  6. Step 6: Final answer
    x = 90,737.32

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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.