Home / 306,721.12-423,264.76-172,559.20

Finding the Fourth Proportional to 306,721.12, 423,264.76 and 172,559.20

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Solution

The fourth proportional to 306,721.12, 423,264.76 and 172,559.20 is: 238,125.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,721.12 : 423,264.76 = 172,559.20 : x
  2. Step 2: Convert to fraction form
    306,721.12/423,264.76 = 172,559.20/x
  3. Step 3: Cross multiply
    306,721.12x = 423,264.76 × 172,559.20
  4. Step 4: Simplify right side
    306,721.12x = 73,038,228,373.79
  5. Step 5: Solve for x
    x = 73,038,228,373.79/306,721.12
  6. Step 6: Final answer
    x = 238,125.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.