Home / 81,412.10-122,132.02-28,089.62

Finding the Fourth Proportional to 81,412.10, 122,132.02 and 28,089.62

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Solution

The fourth proportional to 81,412.10, 122,132.02 and 28,089.62 is: 42,139.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,412.10 : 122,132.02 = 28,089.62 : x
  2. Step 2: Convert to fraction form
    81,412.10/122,132.02 = 28,089.62/x
  3. Step 3: Cross multiply
    81,412.10x = 122,132.02 × 28,089.62
  4. Step 4: Simplify right side
    81,412.10x = 3,430,642,031.63
  5. Step 5: Solve for x
    x = 3,430,642,031.63/81,412.10
  6. Step 6: Final answer
    x = 42,139.22

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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.