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Finding the Fourth Proportional to 70,685.64, 97,547.40 and 38,855.88

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Solution

The fourth proportional to 70,685.64, 97,547.40 and 38,855.88 is: 53,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,685.64 : 97,547.40 = 38,855.88 : x
  2. Step 2: Convert to fraction form
    70,685.64/97,547.40 = 38,855.88/x
  3. Step 3: Cross multiply
    70,685.64x = 97,547.40 × 38,855.88
  4. Step 4: Simplify right side
    70,685.64x = 3,790,290,068.71
  5. Step 5: Solve for x
    x = 3,790,290,068.71/70,685.64
  6. Step 6: Final answer
    x = 53,621.78

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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.