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Finding the Fourth Proportional to 56,987.60, 85,327.80 and 41,320.40

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Solution

The fourth proportional to 56,987.60, 85,327.80 and 41,320.40 is: 61,869.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,987.60 : 85,327.80 = 41,320.40 : x
  2. Step 2: Convert to fraction form
    56,987.60/85,327.80 = 41,320.40/x
  3. Step 3: Cross multiply
    56,987.60x = 85,327.80 × 41,320.40
  4. Step 4: Simplify right side
    56,987.60x = 3,525,778,827.12
  5. Step 5: Solve for x
    x = 3,525,778,827.12/56,987.60
  6. Step 6: Final answer
    x = 61,869.23

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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.