Home / 100,000.90-138,003.24-54,681.72

Finding the Fourth Proportional to 100,000.90, 138,003.24 and 54,681.72

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Solution

The fourth proportional to 100,000.90, 138,003.24 and 54,681.72 is: 75,461.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,000.90 : 138,003.24 = 54,681.72 : x
  2. Step 2: Convert to fraction form
    100,000.90/138,003.24 = 54,681.72/x
  3. Step 3: Cross multiply
    100,000.90x = 138,003.24 × 54,681.72
  4. Step 4: Simplify right side
    100,000.90x = 7,546,254,528.77
  5. Step 5: Solve for x
    x = 7,546,254,528.77/100,000.90
  6. Step 6: Final answer
    x = 75,461.87

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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.