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Finding the Fourth Proportional to 70,863, 97,790.94 and 39,031.80

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Solution

The fourth proportional to 70,863, 97,790.94 and 39,031.80 is: 53,863.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,863 : 97,790.94 = 39,031.80 : x
  2. Step 2: Convert to fraction form
    70,863/97,790.94 = 39,031.80/x
  3. Step 3: Cross multiply
    70,863x = 97,790.94 × 39,031.80
  4. Step 4: Simplify right side
    70,863x = 3,816,956,411.89
  5. Step 5: Solve for x
    x = 3,816,956,411.89/70,863
  6. Step 6: Final answer
    x = 53,863.88

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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.