Home / 219,985.20-330,087.15-86,869.80

Finding the Fourth Proportional to 219,985.20, 330,087.15 and 86,869.80

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Solution

The fourth proportional to 219,985.20, 330,087.15 and 86,869.80 is: 130,347.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,985.20 : 330,087.15 = 86,869.80 : x
  2. Step 2: Convert to fraction form
    219,985.20/330,087.15 = 86,869.80/x
  3. Step 3: Cross multiply
    219,985.20x = 330,087.15 × 86,869.80
  4. Step 4: Simplify right side
    219,985.20x = 28,674,604,703.07
  5. Step 5: Solve for x
    x = 28,674,604,703.07/219,985.20
  6. Step 6: Final answer
    x = 130,347.88

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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.