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Finding the Fourth Proportional to 70,908.75, 97,856.10 and 39,079.70

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Solution

The fourth proportional to 70,908.75, 97,856.10 and 39,079.70 is: 53,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,908.75 : 97,856.10 = 39,079.70 : x
  2. Step 2: Convert to fraction form
    70,908.75/97,856.10 = 39,079.70/x
  3. Step 3: Cross multiply
    70,908.75x = 97,856.10 × 39,079.70
  4. Step 4: Simplify right side
    70,908.75x = 3,824,186,908.85
  5. Step 5: Solve for x
    x = 3,824,186,908.85/70,908.75
  6. Step 6: Final answer
    x = 53,931.10

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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.