Home / 124,720.20-186,875.10-72,037.80

Finding the Fourth Proportional to 124,720.20, 186,875.10 and 72,037.80

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Solution

The fourth proportional to 124,720.20, 186,875.10 and 72,037.80 is: 107,938.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,720.20 : 186,875.10 = 72,037.80 : x
  2. Step 2: Convert to fraction form
    124,720.20/186,875.10 = 72,037.80/x
  3. Step 3: Cross multiply
    124,720.20x = 186,875.10 × 72,037.80
  4. Step 4: Simplify right side
    124,720.20x = 13,462,071,078.78
  5. Step 5: Solve for x
    x = 13,462,071,078.78/124,720.20
  6. Step 6: Final answer
    x = 107,938.18

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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.