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Finding the Fourth Proportional to 139,219.79, 192,123.45 and 75,557.61

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Solution

The fourth proportional to 139,219.79, 192,123.45 and 75,557.61 is: 104,269.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,219.79 : 192,123.45 = 75,557.61 : x
  2. Step 2: Convert to fraction form
    139,219.79/192,123.45 = 75,557.61/x
  3. Step 3: Cross multiply
    139,219.79x = 192,123.45 × 75,557.61
  4. Step 4: Simplify right side
    139,219.79x = 14,516,387,368.55
  5. Step 5: Solve for x
    x = 14,516,387,368.55/139,219.79
  6. Step 6: Final answer
    x = 104,269.57

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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.