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Finding the Fourth Proportional to 70,689.61, 97,547.57 and 38,858.51

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Solution

The fourth proportional to 70,689.61, 97,547.57 and 38,858.51 is: 53,622.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,689.61 : 97,547.57 = 38,858.51 : x
  2. Step 2: Convert to fraction form
    70,689.61/97,547.57 = 38,858.51/x
  3. Step 3: Cross multiply
    70,689.61x = 97,547.57 × 38,858.51
  4. Step 4: Simplify right side
    70,689.61x = 3,790,553,035.97
  5. Step 5: Solve for x
    x = 3,790,553,035.97/70,689.61
  6. Step 6: Final answer
    x = 53,622.49

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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.