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Finding the Fourth Proportional to 112,987.97, 155,996.43 and 70,013.06

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Solution

The fourth proportional to 112,987.97, 155,996.43 and 70,013.06 is: 96,663.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,987.97 : 155,996.43 = 70,013.06 : x
  2. Step 2: Convert to fraction form
    112,987.97/155,996.43 = 70,013.06/x
  3. Step 3: Cross multiply
    112,987.97x = 155,996.43 × 70,013.06
  4. Step 4: Simplify right side
    112,987.97x = 10,921,787,413.38
  5. Step 5: Solve for x
    x = 10,921,787,413.38/112,987.97
  6. Step 6: Final answer
    x = 96,663.28

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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.