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Finding the Fourth Proportional to 70,072.93, 96,702.78 and 39,862.63

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Solution

The fourth proportional to 70,072.93, 96,702.78 and 39,862.63 is: 55,011.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,072.93 : 96,702.78 = 39,862.63 : x
  2. Step 2: Convert to fraction form
    70,072.93/96,702.78 = 39,862.63/x
  3. Step 3: Cross multiply
    70,072.93x = 96,702.78 × 39,862.63
  4. Step 4: Simplify right side
    70,072.93x = 3,854,827,139.11
  5. Step 5: Solve for x
    x = 3,854,827,139.11/70,072.93
  6. Step 6: Final answer
    x = 55,011.64

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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.