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Finding the Fourth Proportional to 66,666.95, 100,037.32 and 39,947.30

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Solution

The fourth proportional to 66,666.95, 100,037.32 and 39,947.30 is: 59,943.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,666.95 : 100,037.32 = 39,947.30 : x
  2. Step 2: Convert to fraction form
    66,666.95/100,037.32 = 39,947.30/x
  3. Step 3: Cross multiply
    66,666.95x = 100,037.32 × 39,947.30
  4. Step 4: Simplify right side
    66,666.95x = 3,996,220,233.18
  5. Step 5: Solve for x
    x = 3,996,220,233.18/66,666.95
  6. Step 6: Final answer
    x = 59,943.05

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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.