Home / 115,140.20-158,888.10-77,408.36

Finding the Fourth Proportional to 115,140.20, 158,888.10 and 77,408.36

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Solution

The fourth proportional to 115,140.20, 158,888.10 and 77,408.36 is: 106,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,140.20 : 158,888.10 = 77,408.36 : x
  2. Step 2: Convert to fraction form
    115,140.20/158,888.10 = 77,408.36/x
  3. Step 3: Cross multiply
    115,140.20x = 158,888.10 × 77,408.36
  4. Step 4: Simplify right side
    115,140.20x = 12,299,267,244.52
  5. Step 5: Solve for x
    x = 12,299,267,244.52/115,140.20
  6. Step 6: Final answer
    x = 106,819.92

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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.