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Finding the Fourth Proportional to 61,407.60, 91,981.80 and 48,188.40

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Solution

The fourth proportional to 61,407.60, 91,981.80 and 48,188.40 is: 72,180.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,407.60 : 91,981.80 = 48,188.40 : x
  2. Step 2: Convert to fraction form
    61,407.60/91,981.80 = 48,188.40/x
  3. Step 3: Cross multiply
    61,407.60x = 91,981.80 × 48,188.40
  4. Step 4: Simplify right side
    61,407.60x = 4,432,455,771.12
  5. Step 5: Solve for x
    x = 4,432,455,771.12/61,407.60
  6. Step 6: Final answer
    x = 72,180.90

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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.