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Finding the Fourth Proportional to 135,478.52, 186,957.90 and 75,048.98

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Solution

The fourth proportional to 135,478.52, 186,957.90 and 75,048.98 is: 103,566.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,478.52 : 186,957.90 = 75,048.98 : x
  2. Step 2: Convert to fraction form
    135,478.52/186,957.90 = 75,048.98/x
  3. Step 3: Cross multiply
    135,478.52x = 186,957.90 × 75,048.98
  4. Step 4: Simplify right side
    135,478.52x = 14,030,998,763.15
  5. Step 5: Solve for x
    x = 14,030,998,763.15/135,478.52
  6. Step 6: Final answer
    x = 103,566.23

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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.