Home / 66,386.10-99,542.24-21,988.65

Finding the Fourth Proportional to 66,386.10, 99,542.24 and 21,988.65

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Solution

The fourth proportional to 66,386.10, 99,542.24 and 21,988.65 is: 32,970.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,386.10 : 99,542.24 = 21,988.65 : x
  2. Step 2: Convert to fraction form
    66,386.10/99,542.24 = 21,988.65/x
  3. Step 3: Cross multiply
    66,386.10x = 99,542.24 × 21,988.65
  4. Step 4: Simplify right side
    66,386.10x = 2,188,799,365.63
  5. Step 5: Solve for x
    x = 2,188,799,365.63/66,386.10
  6. Step 6: Final answer
    x = 32,970.75

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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.