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Finding the Fourth Proportional to 70,878.71, 97,812.61 and 39,047.61

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Solution

The fourth proportional to 70,878.71, 97,812.61 and 39,047.61 is: 53,885.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,878.71 : 97,812.61 = 39,047.61 : x
  2. Step 2: Convert to fraction form
    70,878.71/97,812.61 = 39,047.61/x
  3. Step 3: Cross multiply
    70,878.71x = 97,812.61 × 39,047.61
  4. Step 4: Simplify right side
    70,878.71x = 3,819,348,917.54
  5. Step 5: Solve for x
    x = 3,819,348,917.54/70,878.71
  6. Step 6: Final answer
    x = 53,885.70

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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.