Home / 145,835.90-218,316.45-86,641.10

Finding the Fourth Proportional to 145,835.90, 218,316.45 and 86,641.10

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Solution

The fourth proportional to 145,835.90, 218,316.45 and 86,641.10 is: 129,701.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,835.90 : 218,316.45 = 86,641.10 : x
  2. Step 2: Convert to fraction form
    145,835.90/218,316.45 = 86,641.10/x
  3. Step 3: Cross multiply
    145,835.90x = 218,316.45 × 86,641.10
  4. Step 4: Simplify right side
    145,835.90x = 18,915,177,376.10
  5. Step 5: Solve for x
    x = 18,915,177,376.10/145,835.90
  6. Step 6: Final answer
    x = 129,701.79

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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.