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Finding the Fourth Proportional to 319,761.12, 479,643.12 and 83,087.04

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Solution

The fourth proportional to 319,761.12, 479,643.12 and 83,087.04 is: 124,630.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,761.12 : 479,643.12 = 83,087.04 : x
  2. Step 2: Convert to fraction form
    319,761.12/479,643.12 = 83,087.04/x
  3. Step 3: Cross multiply
    319,761.12x = 479,643.12 × 83,087.04
  4. Step 4: Simplify right side
    319,761.12x = 39,852,127,097.16
  5. Step 5: Solve for x
    x = 39,852,127,097.16/319,761.12
  6. Step 6: Final answer
    x = 124,630.93

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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.