Home / 131,478.17-181,452.63-77,780.48

Finding the Fourth Proportional to 131,478.17, 181,452.63 and 77,780.48

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Solution

The fourth proportional to 131,478.17, 181,452.63 and 77,780.48 is: 107,344.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,478.17 : 181,452.63 = 77,780.48 : x
  2. Step 2: Convert to fraction form
    131,478.17/181,452.63 = 77,780.48/x
  3. Step 3: Cross multiply
    131,478.17x = 181,452.63 × 77,780.48
  4. Step 4: Simplify right side
    131,478.17x = 14,113,471,751.40
  5. Step 5: Solve for x
    x = 14,113,471,751.40/131,478.17
  6. Step 6: Final answer
    x = 107,344.61

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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.