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Finding the Fourth Proportional to 258,386.04, 387,578.52 and 71,397

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Solution

The fourth proportional to 258,386.04, 387,578.52 and 71,397 is: 107,095.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,386.04 : 387,578.52 = 71,397 : x
  2. Step 2: Convert to fraction form
    258,386.04/387,578.52 = 71,397/x
  3. Step 3: Cross multiply
    258,386.04x = 387,578.52 × 71,397
  4. Step 4: Simplify right side
    258,386.04x = 27,671,943,592.44
  5. Step 5: Solve for x
    x = 27,671,943,592.44/258,386.04
  6. Step 6: Final answer
    x = 107,095.35

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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.