Home / 205,812.30-308,718.45-72,842.70

Finding the Fourth Proportional to 205,812.30, 308,718.45 and 72,842.70

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Solution

The fourth proportional to 205,812.30, 308,718.45 and 72,842.70 is: 109,264.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,812.30 : 308,718.45 = 72,842.70 : x
  2. Step 2: Convert to fraction form
    205,812.30/308,718.45 = 72,842.70/x
  3. Step 3: Cross multiply
    205,812.30x = 308,718.45 × 72,842.70
  4. Step 4: Simplify right side
    205,812.30x = 22,487,885,437.82
  5. Step 5: Solve for x
    x = 22,487,885,437.82/205,812.30
  6. Step 6: Final answer
    x = 109,264.05

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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.