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Finding the Fourth Proportional to 85,220.90, 127,831.35 and 48,356.90

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Solution

The fourth proportional to 85,220.90, 127,831.35 and 48,356.90 is: 72,535.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,220.90 : 127,831.35 = 48,356.90 : x
  2. Step 2: Convert to fraction form
    85,220.90/127,831.35 = 48,356.90/x
  3. Step 3: Cross multiply
    85,220.90x = 127,831.35 × 48,356.90
  4. Step 4: Simplify right side
    85,220.90x = 6,181,527,808.82
  5. Step 5: Solve for x
    x = 6,181,527,808.82/85,220.90
  6. Step 6: Final answer
    x = 72,535.35

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Similar ratio
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1.5x scale

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.