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Finding the Fourth Proportional to 81,507.90, 112,480.90 and 45,697.98

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Solution

The fourth proportional to 81,507.90, 112,480.90 and 45,697.98 is: 63,063.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,507.90 : 112,480.90 = 45,697.98 : x
  2. Step 2: Convert to fraction form
    81,507.90/112,480.90 = 45,697.98/x
  3. Step 3: Cross multiply
    81,507.90x = 112,480.90 × 45,697.98
  4. Step 4: Simplify right side
    81,507.90x = 5,140,149,918.58
  5. Step 5: Solve for x
    x = 5,140,149,918.58/81,507.90
  6. Step 6: Final answer
    x = 63,063.21

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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.