Home / 145,977.40-218,528.70-86,782.60

Finding the Fourth Proportional to 145,977.40, 218,528.70 and 86,782.60

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Solution

The fourth proportional to 145,977.40, 218,528.70 and 86,782.60 is: 129,913.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,977.40 : 218,528.70 = 86,782.60 : x
  2. Step 2: Convert to fraction form
    145,977.40/218,528.70 = 86,782.60/x
  3. Step 3: Cross multiply
    145,977.40x = 218,528.70 × 86,782.60
  4. Step 4: Simplify right side
    145,977.40x = 18,964,488,760.62
  5. Step 5: Solve for x
    x = 18,964,488,760.62/145,977.40
  6. Step 6: Final answer
    x = 129,913.87

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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.