Home / 145,718.40-218,140.20-86,523.60

Finding the Fourth Proportional to 145,718.40, 218,140.20 and 86,523.60

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Solution

The fourth proportional to 145,718.40, 218,140.20 and 86,523.60 is: 129,525.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,718.40 : 218,140.20 = 86,523.60 : x
  2. Step 2: Convert to fraction form
    145,718.40/218,140.20 = 86,523.60/x
  3. Step 3: Cross multiply
    145,718.40x = 218,140.20 × 86,523.60
  4. Step 4: Simplify right side
    145,718.40x = 18,874,275,408.72
  5. Step 5: Solve for x
    x = 18,874,275,408.72/145,718.40
  6. Step 6: Final answer
    x = 129,525.68

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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.