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Finding the Fourth Proportional to 81,648.61, 112,668.85 and 45,831.70

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Solution

The fourth proportional to 81,648.61, 112,668.85 and 45,831.70 is: 63,244.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,648.61 : 112,668.85 = 45,831.70 : x
  2. Step 2: Convert to fraction form
    81,648.61/112,668.85 = 45,831.70/x
  3. Step 3: Cross multiply
    81,648.61x = 112,668.85 × 45,831.70
  4. Step 4: Simplify right side
    81,648.61x = 5,163,804,932.55
  5. Step 5: Solve for x
    x = 5,163,804,932.55/81,648.61
  6. Step 6: Final answer
    x = 63,244.25

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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.