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Finding the Fourth Proportional to 99,887.50, 137,844.75 and 57,445.12

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Solution

The fourth proportional to 99,887.50, 137,844.75 and 57,445.12 is: 79,274.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,887.50 : 137,844.75 = 57,445.12 : x
  2. Step 2: Convert to fraction form
    99,887.50/137,844.75 = 57,445.12/x
  3. Step 3: Cross multiply
    99,887.50x = 137,844.75 × 57,445.12
  4. Step 4: Simplify right side
    99,887.50x = 7,918,508,205.12
  5. Step 5: Solve for x
    x = 7,918,508,205.12/99,887.50
  6. Step 6: Final answer
    x = 79,274.27

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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.