Home / 272,429.10-408,643.65-85,440.30

Finding the Fourth Proportional to 272,429.10, 408,643.65 and 85,440.30

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Solution

The fourth proportional to 272,429.10, 408,643.65 and 85,440.30 is: 128,160.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,429.10 : 408,643.65 = 85,440.30 : x
  2. Step 2: Convert to fraction form
    272,429.10/408,643.65 = 85,440.30/x
  3. Step 3: Cross multiply
    272,429.10x = 408,643.65 × 85,440.30
  4. Step 4: Simplify right side
    272,429.10x = 34,914,636,049.10
  5. Step 5: Solve for x
    x = 34,914,636,049.10/272,429.10
  6. Step 6: Final answer
    x = 128,160.45

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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.