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Finding the Fourth Proportional to 79,680.60, 109,977.90 and 45,688.47

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Solution

The fourth proportional to 79,680.60, 109,977.90 and 45,688.47 is: 63,060.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,680.60 : 109,977.90 = 45,688.47 : x
  2. Step 2: Convert to fraction form
    79,680.60/109,977.90 = 45,688.47/x
  3. Step 3: Cross multiply
    79,680.60x = 109,977.90 × 45,688.47
  4. Step 4: Simplify right side
    79,680.60x = 5,024,721,984.81
  5. Step 5: Solve for x
    x = 5,024,721,984.81/79,680.60
  6. Step 6: Final answer
    x = 63,060.80

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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.