Home / 138,434.52-191,032.38-78,005.28

Finding the Fourth Proportional to 138,434.52, 191,032.38 and 78,005.28

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Solution

The fourth proportional to 138,434.52, 191,032.38 and 78,005.28 is: 107,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,434.52 : 191,032.38 = 78,005.28 : x
  2. Step 2: Convert to fraction form
    138,434.52/191,032.38 = 78,005.28/x
  3. Step 3: Cross multiply
    138,434.52x = 191,032.38 × 78,005.28
  4. Step 4: Simplify right side
    138,434.52x = 14,901,534,290.97
  5. Step 5: Solve for x
    x = 14,901,534,290.97/138,434.52
  6. Step 6: Final answer
    x = 107,643.20

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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.