Home / 145,619.90-218,429.85-86,425.10

Finding the Fourth Proportional to 145,619.90, 218,429.85 and 86,425.10

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Solution

The fourth proportional to 145,619.90, 218,429.85 and 86,425.10 is: 129,637.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,619.90 : 218,429.85 = 86,425.10 : x
  2. Step 2: Convert to fraction form
    145,619.90/218,429.85 = 86,425.10/x
  3. Step 3: Cross multiply
    145,619.90x = 218,429.85 × 86,425.10
  4. Step 4: Simplify right side
    145,619.90x = 18,877,821,629.24
  5. Step 5: Solve for x
    x = 18,877,821,629.24/145,619.90
  6. Step 6: Final answer
    x = 129,637.65

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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.