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Finding the Fourth Proportional to 61,890, 92,820.06 and 28,578.04

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Solution

The fourth proportional to 61,890, 92,820.06 and 28,578.04 is: 42,860.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,890 : 92,820.06 = 28,578.04 : x
  2. Step 2: Convert to fraction form
    61,890/92,820.06 = 28,578.04/x
  3. Step 3: Cross multiply
    61,890x = 92,820.06 × 28,578.04
  4. Step 4: Simplify right side
    61,890x = 2,652,615,387.48
  5. Step 5: Solve for x
    x = 2,652,615,387.48/61,890
  6. Step 6: Final answer
    x = 42,860.16

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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.