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Finding the Fourth Proportional to 70,392.50, 97,144.08 and 38,561.40

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Solution

The fourth proportional to 70,392.50, 97,144.08 and 38,561.40 is: 53,216.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,392.50 : 97,144.08 = 38,561.40 : x
  2. Step 2: Convert to fraction form
    70,392.50/97,144.08 = 38,561.40/x
  3. Step 3: Cross multiply
    70,392.50x = 97,144.08 × 38,561.40
  4. Step 4: Simplify right side
    70,392.50x = 3,746,011,581.91
  5. Step 5: Solve for x
    x = 3,746,011,581.91/70,392.50
  6. Step 6: Final answer
    x = 53,216.06

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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.