Home / 145,749.60-218,494.80-86,522.40

Finding the Fourth Proportional to 145,749.60, 218,494.80 and 86,522.40

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Solution

The fourth proportional to 145,749.60, 218,494.80 and 86,522.40 is: 129,706.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,749.60 : 218,494.80 = 86,522.40 : x
  2. Step 2: Convert to fraction form
    145,749.60/218,494.80 = 86,522.40/x
  3. Step 3: Cross multiply
    145,749.60x = 218,494.80 × 86,522.40
  4. Step 4: Simplify right side
    145,749.60x = 18,904,694,483.52
  5. Step 5: Solve for x
    x = 18,904,694,483.52/145,749.60
  6. Step 6: Final answer
    x = 129,706.66

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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.