Home / 105,139.18-145,144.11-64,875.13

Finding the Fourth Proportional to 105,139.18, 145,144.11 and 64,875.13

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Solution

The fourth proportional to 105,139.18, 145,144.11 and 64,875.13 is: 89,559.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,139.18 : 145,144.11 = 64,875.13 : x
  2. Step 2: Convert to fraction form
    105,139.18/145,144.11 = 64,875.13/x
  3. Step 3: Cross multiply
    105,139.18x = 145,144.11 × 64,875.13
  4. Step 4: Simplify right side
    105,139.18x = 9,416,242,279.26
  5. Step 5: Solve for x
    x = 9,416,242,279.26/105,139.18
  6. Step 6: Final answer
    x = 89,559.78

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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.