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Finding the Fourth Proportional to 139,292.46, 192,220.70 and 75,630.31

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Solution

The fourth proportional to 139,292.46, 192,220.70 and 75,630.31 is: 104,368.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,292.46 : 192,220.70 = 75,630.31 : x
  2. Step 2: Convert to fraction form
    139,292.46/192,220.70 = 75,630.31/x
  3. Step 3: Cross multiply
    139,292.46x = 192,220.70 × 75,630.31
  4. Step 4: Simplify right side
    139,292.46x = 14,537,711,129.42
  5. Step 5: Solve for x
    x = 14,537,711,129.42/139,292.46
  6. Step 6: Final answer
    x = 104,368.26

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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.