Home / 66,461.10-99,720.45-31,382.70

Finding the Fourth Proportional to 66,461.10, 99,720.45 and 31,382.70

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Solution

The fourth proportional to 66,461.10, 99,720.45 and 31,382.70 is: 47,087.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.10 : 99,720.45 = 31,382.70 : x
  2. Step 2: Convert to fraction form
    66,461.10/99,720.45 = 31,382.70/x
  3. Step 3: Cross multiply
    66,461.10x = 99,720.45 × 31,382.70
  4. Step 4: Simplify right side
    66,461.10x = 3,129,496,966.22
  5. Step 5: Solve for x
    x = 3,129,496,966.22/66,461.10
  6. Step 6: Final answer
    x = 47,087.65

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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.