Home / 138,887.04-208,131.04-78,963.20

Finding the Fourth Proportional to 138,887.04, 208,131.04 and 78,963.20

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Solution

The fourth proportional to 138,887.04, 208,131.04 and 78,963.20 is: 118,331.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.04 : 208,131.04 = 78,963.20 : x
  2. Step 2: Convert to fraction form
    138,887.04/208,131.04 = 78,963.20/x
  3. Step 3: Cross multiply
    138,887.04x = 208,131.04 × 78,963.20
  4. Step 4: Simplify right side
    138,887.04x = 16,434,692,937.73
  5. Step 5: Solve for x
    x = 16,434,692,937.73/138,887.04
  6. Step 6: Final answer
    x = 118,331.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.