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Finding the Fourth Proportional to 138,614.70, 191,267.07 and 78,182.70

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Solution

The fourth proportional to 138,614.70, 191,267.07 and 78,182.70 is: 107,880.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,614.70 : 191,267.07 = 78,182.70 : x
  2. Step 2: Convert to fraction form
    138,614.70/191,267.07 = 78,182.70/x
  3. Step 3: Cross multiply
    138,614.70x = 191,267.07 × 78,182.70
  4. Step 4: Simplify right side
    138,614.70x = 14,953,775,953.69
  5. Step 5: Solve for x
    x = 14,953,775,953.69/138,614.70
  6. Step 6: Final answer
    x = 107,880.16

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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.