Home / 145,844.40-218,329.20-86,649.60

Finding the Fourth Proportional to 145,844.40, 218,329.20 and 86,649.60

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Solution

The fourth proportional to 145,844.40, 218,329.20 and 86,649.60 is: 129,714.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,844.40 : 218,329.20 = 86,649.60 : x
  2. Step 2: Convert to fraction form
    145,844.40/218,329.20 = 86,649.60/x
  3. Step 3: Cross multiply
    145,844.40x = 218,329.20 × 86,649.60
  4. Step 4: Simplify right side
    145,844.40x = 18,918,137,848.32
  5. Step 5: Solve for x
    x = 18,918,137,848.32/145,844.40
  6. Step 6: Final answer
    x = 129,714.53

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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.