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Finding the Fourth Proportional to 139,312.80, 192,251.40 and 75,650.58

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Solution

The fourth proportional to 139,312.80, 192,251.40 and 75,650.58 is: 104,397.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,312.80 : 192,251.40 = 75,650.58 : x
  2. Step 2: Convert to fraction form
    139,312.80/192,251.40 = 75,650.58/x
  3. Step 3: Cross multiply
    139,312.80x = 192,251.40 × 75,650.58
  4. Step 4: Simplify right side
    139,312.80x = 14,543,929,915.81
  5. Step 5: Solve for x
    x = 14,543,929,915.81/139,312.80
  6. Step 6: Final answer
    x = 104,397.66

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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.