Home / 78,126.52-117,111.42-38,712.28

Finding the Fourth Proportional to 78,126.52, 117,111.42 and 38,712.28

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Solution

The fourth proportional to 78,126.52, 117,111.42 and 38,712.28 is: 58,029.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.52 : 117,111.42 = 38,712.28 : x
  2. Step 2: Convert to fraction form
    78,126.52/117,111.42 = 38,712.28/x
  3. Step 3: Cross multiply
    78,126.52x = 117,111.42 × 38,712.28
  4. Step 4: Simplify right side
    78,126.52x = 4,533,650,082.24
  5. Step 5: Solve for x
    x = 4,533,650,082.24/78,126.52
  6. Step 6: Final answer
    x = 58,029.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.