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Finding the Fourth Proportional to 76,968.60, 115,452.90 and 72,011.40

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Solution

The fourth proportional to 76,968.60, 115,452.90 and 72,011.40 is: 108,017.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,968.60 : 115,452.90 = 72,011.40 : x
  2. Step 2: Convert to fraction form
    76,968.60/115,452.90 = 72,011.40/x
  3. Step 3: Cross multiply
    76,968.60x = 115,452.90 × 72,011.40
  4. Step 4: Simplify right side
    76,968.60x = 8,313,924,963.06
  5. Step 5: Solve for x
    x = 8,313,924,963.06/76,968.60
  6. Step 6: Final answer
    x = 108,017.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.