Home / 100,013.08-138,031.02-57,008.02

Finding the Fourth Proportional to 100,013.08, 138,031.02 and 57,008.02

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Solution

The fourth proportional to 100,013.08, 138,031.02 and 57,008.02 is: 78,678.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,013.08 : 138,031.02 = 57,008.02 : x
  2. Step 2: Convert to fraction form
    100,013.08/138,031.02 = 57,008.02/x
  3. Step 3: Cross multiply
    100,013.08x = 138,031.02 × 57,008.02
  4. Step 4: Simplify right side
    100,013.08x = 7,868,875,148.78
  5. Step 5: Solve for x
    x = 7,868,875,148.78/100,013.08
  6. Step 6: Final answer
    x = 78,678.46

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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.