Home / 457,678.10-686,563.28-120,742.04

Finding the Fourth Proportional to 457,678.10, 686,563.28 and 120,742.04

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Solution

The fourth proportional to 457,678.10, 686,563.28 and 120,742.04 is: 181,125.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,678.10 : 686,563.28 = 120,742.04 : x
  2. Step 2: Convert to fraction form
    457,678.10/686,563.28 = 120,742.04/x
  3. Step 3: Cross multiply
    457,678.10x = 686,563.28 × 120,742.04
  4. Step 4: Simplify right side
    457,678.10x = 82,897,046,979.76
  5. Step 5: Solve for x
    x = 82,897,046,979.76/457,678.10
  6. Step 6: Final answer
    x = 181,125.22

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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.