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Finding the Fourth Proportional to 81,642.76, 112,666.02 and 45,831.85

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Solution

The fourth proportional to 81,642.76, 112,666.02 and 45,831.85 is: 63,247.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,642.76 : 112,666.02 = 45,831.85 : x
  2. Step 2: Convert to fraction form
    81,642.76/112,666.02 = 45,831.85/x
  3. Step 3: Cross multiply
    81,642.76x = 112,666.02 × 45,831.85
  4. Step 4: Simplify right side
    81,642.76x = 5,163,691,675.20
  5. Step 5: Solve for x
    x = 5,163,691,675.20/81,642.76
  6. Step 6: Final answer
    x = 63,247.39

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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.