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Finding the Fourth Proportional to 70,121.68, 97,421.18 and 69,280.92

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Solution

The fourth proportional to 70,121.68, 97,421.18 and 69,280.92 is: 96,253.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,121.68 : 97,421.18 = 69,280.92 : x
  2. Step 2: Convert to fraction form
    70,121.68/97,421.18 = 69,280.92/x
  3. Step 3: Cross multiply
    70,121.68x = 97,421.18 × 69,280.92
  4. Step 4: Simplify right side
    70,121.68x = 6,749,428,977.89
  5. Step 5: Solve for x
    x = 6,749,428,977.89/70,121.68
  6. Step 6: Final answer
    x = 96,253.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.