Home / 138,158.52-190,675.71-77,731.80

Finding the Fourth Proportional to 138,158.52, 190,675.71 and 77,731.80

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Solution

The fourth proportional to 138,158.52, 190,675.71 and 77,731.80 is: 107,279.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,158.52 : 190,675.71 = 77,731.80 : x
  2. Step 2: Convert to fraction form
    138,158.52/190,675.71 = 77,731.80/x
  3. Step 3: Cross multiply
    138,158.52x = 190,675.71 × 77,731.80
  4. Step 4: Simplify right side
    138,158.52x = 14,821,566,154.58
  5. Step 5: Solve for x
    x = 14,821,566,154.58/138,158.52
  6. Step 6: Final answer
    x = 107,279.42

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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.