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Finding the Fourth Proportional to 56,985.80, 85,478.70 and 25,881.80

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Solution

The fourth proportional to 56,985.80, 85,478.70 and 25,881.80 is: 38,822.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,985.80 : 85,478.70 = 25,881.80 : x
  2. Step 2: Convert to fraction form
    56,985.80/85,478.70 = 25,881.80/x
  3. Step 3: Cross multiply
    56,985.80x = 85,478.70 × 25,881.80
  4. Step 4: Simplify right side
    56,985.80x = 2,212,342,617.66
  5. Step 5: Solve for x
    x = 2,212,342,617.66/56,985.80
  6. Step 6: Final answer
    x = 38,822.70

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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.