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Finding the Fourth Proportional to 81,291.60, 121,937.40 and 41,925.60

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Solution

The fourth proportional to 81,291.60, 121,937.40 and 41,925.60 is: 62,888.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,291.60 : 121,937.40 = 41,925.60 : x
  2. Step 2: Convert to fraction form
    81,291.60/121,937.40 = 41,925.60/x
  3. Step 3: Cross multiply
    81,291.60x = 121,937.40 × 41,925.60
  4. Step 4: Simplify right side
    81,291.60x = 5,112,298,657.44
  5. Step 5: Solve for x
    x = 5,112,298,657.44/81,291.60
  6. Step 6: Final answer
    x = 62,888.40

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1.5x scale

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.