Home / 138,006.40-190,446.24-87,008.80

Finding the Fourth Proportional to 138,006.40, 190,446.24 and 87,008.80

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Solution

The fourth proportional to 138,006.40, 190,446.24 and 87,008.80 is: 120,070.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,006.40 : 190,446.24 = 87,008.80 : x
  2. Step 2: Convert to fraction form
    138,006.40/190,446.24 = 87,008.80/x
  3. Step 3: Cross multiply
    138,006.40x = 190,446.24 × 87,008.80
  4. Step 4: Simplify right side
    138,006.40x = 16,570,498,806.91
  5. Step 5: Solve for x
    x = 16,570,498,806.91/138,006.40
  6. Step 6: Final answer
    x = 120,070.51

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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.