Home / 138,445.52-191,041.82-78,006.20

Finding the Fourth Proportional to 138,445.52, 191,041.82 and 78,006.20

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Solution

The fourth proportional to 138,445.52, 191,041.82 and 78,006.20 is: 107,641.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,445.52 : 191,041.82 = 78,006.20 : x
  2. Step 2: Convert to fraction form
    138,445.52/191,041.82 = 78,006.20/x
  3. Step 3: Cross multiply
    138,445.52x = 191,041.82 × 78,006.20
  4. Step 4: Simplify right side
    138,445.52x = 14,902,446,419.28
  5. Step 5: Solve for x
    x = 14,902,446,419.28/138,445.52
  6. Step 6: Final answer
    x = 107,641.23

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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.