Home / 113,103.72-156,038.40-65,348.28

Finding the Fourth Proportional to 113,103.72, 156,038.40 and 65,348.28

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Solution

The fourth proportional to 113,103.72, 156,038.40 and 65,348.28 is: 90,154.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,103.72 : 156,038.40 = 65,348.28 : x
  2. Step 2: Convert to fraction form
    113,103.72/156,038.40 = 65,348.28/x
  3. Step 3: Cross multiply
    113,103.72x = 156,038.40 × 65,348.28
  4. Step 4: Simplify right side
    113,103.72x = 10,196,841,053.95
  5. Step 5: Solve for x
    x = 10,196,841,053.95/113,103.72
  6. Step 6: Final answer
    x = 90,154.78

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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.