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Finding the Fourth Proportional to 139,410, 192,386.70 and 75,747.78

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Solution

The fourth proportional to 139,410, 192,386.70 and 75,747.78 is: 104,532.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,410 : 192,386.70 = 75,747.78 : x
  2. Step 2: Convert to fraction form
    139,410/192,386.70 = 75,747.78/x
  3. Step 3: Cross multiply
    139,410x = 192,386.70 × 75,747.78
  4. Step 4: Simplify right side
    139,410x = 14,572,865,426.53
  5. Step 5: Solve for x
    x = 14,572,865,426.53/139,410
  6. Step 6: Final answer
    x = 104,532.43

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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.