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Finding the Fourth Proportional to 78,086.40, 107,740.80 and 44,563.20

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Solution

The fourth proportional to 78,086.40, 107,740.80 and 44,563.20 is: 61,486.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,086.40 : 107,740.80 = 44,563.20 : x
  2. Step 2: Convert to fraction form
    78,086.40/107,740.80 = 44,563.20/x
  3. Step 3: Cross multiply
    78,086.40x = 107,740.80 × 44,563.20
  4. Step 4: Simplify right side
    78,086.40x = 4,801,274,818.56
  5. Step 5: Solve for x
    x = 4,801,274,818.56/78,086.40
  6. Step 6: Final answer
    x = 61,486.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.