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Finding the Fourth Proportional to 70,762.60, 97,395.78 and 66,680.20

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Solution

The fourth proportional to 70,762.60, 97,395.78 and 66,680.20 is: 91,776.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,762.60 : 97,395.78 = 66,680.20 : x
  2. Step 2: Convert to fraction form
    70,762.60/97,395.78 = 66,680.20/x
  3. Step 3: Cross multiply
    70,762.60x = 97,395.78 × 66,680.20
  4. Step 4: Simplify right side
    70,762.60x = 6,494,370,089.56
  5. Step 5: Solve for x
    x = 6,494,370,089.56/70,762.60
  6. Step 6: Final answer
    x = 91,776.87

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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.