Home / 145,834.40-218,314.20-86,639.60

Finding the Fourth Proportional to 145,834.40, 218,314.20 and 86,639.60

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Solution

The fourth proportional to 145,834.40, 218,314.20 and 86,639.60 is: 129,699.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,834.40 : 218,314.20 = 86,639.60 : x
  2. Step 2: Convert to fraction form
    145,834.40/218,314.20 = 86,639.60/x
  3. Step 3: Cross multiply
    145,834.40x = 218,314.20 × 86,639.60
  4. Step 4: Simplify right side
    145,834.40x = 18,914,654,962.32
  5. Step 5: Solve for x
    x = 18,914,654,962.32/145,834.40
  6. Step 6: Final answer
    x = 129,699.54

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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.