Home / 100,011.60-138,013.91-54,689.06

Finding the Fourth Proportional to 100,011.60, 138,013.91 and 54,689.06

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Solution

The fourth proportional to 100,011.60, 138,013.91 and 54,689.06 is: 75,469.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,011.60 : 138,013.91 = 54,689.06 : x
  2. Step 2: Convert to fraction form
    100,011.60/138,013.91 = 54,689.06/x
  3. Step 3: Cross multiply
    100,011.60x = 138,013.91 × 54,689.06
  4. Step 4: Simplify right side
    100,011.60x = 7,547,851,004.82
  5. Step 5: Solve for x
    x = 7,547,851,004.82/100,011.60
  6. Step 6: Final answer
    x = 75,469.76

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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.