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Finding the Fourth Proportional to 78,959.60, 118,002.68 and 70,736.48

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Solution

The fourth proportional to 78,959.60, 118,002.68 and 70,736.48 is: 105,713.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.60 : 118,002.68 = 70,736.48 : x
  2. Step 2: Convert to fraction form
    78,959.60/118,002.68 = 70,736.48/x
  3. Step 3: Cross multiply
    78,959.60x = 118,002.68 × 70,736.48
  4. Step 4: Simplify right side
    78,959.60x = 8,347,094,213.77
  5. Step 5: Solve for x
    x = 8,347,094,213.77/78,959.60
  6. Step 6: Final answer
    x = 105,713.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.