Home / 138,158.89-190,642.13-87,152.29

Finding the Fourth Proportional to 138,158.89, 190,642.13 and 87,152.29

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Solution

The fourth proportional to 138,158.89, 190,642.13 and 87,152.29 is: 120,259.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,158.89 : 190,642.13 = 87,152.29 : x
  2. Step 2: Convert to fraction form
    138,158.89/190,642.13 = 87,152.29/x
  3. Step 3: Cross multiply
    138,158.89x = 190,642.13 × 87,152.29
  4. Step 4: Simplify right side
    138,158.89x = 16,614,897,764.22
  5. Step 5: Solve for x
    x = 16,614,897,764.22/138,158.89
  6. Step 6: Final answer
    x = 120,259.35

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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.