Home / 145,862.40-218,356.20-86,667.60

Finding the Fourth Proportional to 145,862.40, 218,356.20 and 86,667.60

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Solution

The fourth proportional to 145,862.40, 218,356.20 and 86,667.60 is: 129,741.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,862.40 : 218,356.20 = 86,667.60 : x
  2. Step 2: Convert to fraction form
    145,862.40/218,356.20 = 86,667.60/x
  3. Step 3: Cross multiply
    145,862.40x = 218,356.20 × 86,667.60
  4. Step 4: Simplify right side
    145,862.40x = 18,924,407,799.12
  5. Step 5: Solve for x
    x = 18,924,407,799.12/145,862.40
  6. Step 6: Final answer
    x = 129,741.51

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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.