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Finding the Fourth Proportional to 70,686.72, 97,547.10 and 38,855.28

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Solution

The fourth proportional to 70,686.72, 97,547.10 and 38,855.28 is: 53,619.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,686.72 : 97,547.10 = 38,855.28 : x
  2. Step 2: Convert to fraction form
    70,686.72/97,547.10 = 38,855.28/x
  3. Step 3: Cross multiply
    70,686.72x = 97,547.10 × 38,855.28
  4. Step 4: Simplify right side
    70,686.72x = 3,790,219,883.69
  5. Step 5: Solve for x
    x = 3,790,219,883.69/70,686.72
  6. Step 6: Final answer
    x = 53,619.97

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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.