Home / 124,014.20-186,021.30-86,689.40

Finding the Fourth Proportional to 124,014.20, 186,021.30 and 86,689.40

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Solution

The fourth proportional to 124,014.20, 186,021.30 and 86,689.40 is: 130,034.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,014.20 : 186,021.30 = 86,689.40 : x
  2. Step 2: Convert to fraction form
    124,014.20/186,021.30 = 86,689.40/x
  3. Step 3: Cross multiply
    124,014.20x = 186,021.30 × 86,689.40
  4. Step 4: Simplify right side
    124,014.20x = 16,126,074,884.22
  5. Step 5: Solve for x
    x = 16,126,074,884.22/124,014.20
  6. Step 6: Final answer
    x = 130,034.10

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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.