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Finding the Fourth Proportional to 78,580.44, 108,441.10 and 42,770.40

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Solution

The fourth proportional to 78,580.44, 108,441.10 and 42,770.40 is: 59,023.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,580.44 : 108,441.10 = 42,770.40 : x
  2. Step 2: Convert to fraction form
    78,580.44/108,441.10 = 42,770.40/x
  3. Step 3: Cross multiply
    78,580.44x = 108,441.10 × 42,770.40
  4. Step 4: Simplify right side
    78,580.44x = 4,638,069,223.44
  5. Step 5: Solve for x
    x = 4,638,069,223.44/78,580.44
  6. Step 6: Final answer
    x = 59,023.20

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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.