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Finding the Fourth Proportional to 81,507.86, 112,480.54 and 45,697.85

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Solution

The fourth proportional to 81,507.86, 112,480.54 and 45,697.85 is: 63,062.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,507.86 : 112,480.54 = 45,697.85 : x
  2. Step 2: Convert to fraction form
    81,507.86/112,480.54 = 45,697.85/x
  3. Step 3: Cross multiply
    81,507.86x = 112,480.54 × 45,697.85
  4. Step 4: Simplify right side
    81,507.86x = 5,140,118,168.19
  5. Step 5: Solve for x
    x = 5,140,118,168.19/81,507.86
  6. Step 6: Final answer
    x = 63,062.86

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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.