Home / 77,347.86-115,792.02-42,180.90

Finding the Fourth Proportional to 77,347.86, 115,792.02 and 42,180.90

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Solution

The fourth proportional to 77,347.86, 115,792.02 and 42,180.90 is: 63,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,347.86 : 115,792.02 = 42,180.90 : x
  2. Step 2: Convert to fraction form
    77,347.86/115,792.02 = 42,180.90/x
  3. Step 3: Cross multiply
    77,347.86x = 115,792.02 × 42,180.90
  4. Step 4: Simplify right side
    77,347.86x = 4,884,211,616.42
  5. Step 5: Solve for x
    x = 4,884,211,616.42/77,347.86
  6. Step 6: Final answer
    x = 63,146.05

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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.