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Finding the Fourth Proportional to 79,663.60, 109,969.80 and 56,708.24

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Solution

The fourth proportional to 79,663.60, 109,969.80 and 56,708.24 is: 78,281.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,663.60 : 109,969.80 = 56,708.24 : x
  2. Step 2: Convert to fraction form
    79,663.60/109,969.80 = 56,708.24/x
  3. Step 3: Cross multiply
    79,663.60x = 109,969.80 × 56,708.24
  4. Step 4: Simplify right side
    79,663.60x = 6,236,193,811.15
  5. Step 5: Solve for x
    x = 6,236,193,811.15/79,663.60
  6. Step 6: Final answer
    x = 78,281.60

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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.