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Finding the Fourth Proportional to 55,970.78, 83,967.25 and 15,990.11

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Solution

The fourth proportional to 55,970.78, 83,967.25 and 15,990.11 is: 23,988.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,970.78 : 83,967.25 = 15,990.11 : x
  2. Step 2: Convert to fraction form
    55,970.78/83,967.25 = 15,990.11/x
  3. Step 3: Cross multiply
    55,970.78x = 83,967.25 × 15,990.11
  4. Step 4: Simplify right side
    55,970.78x = 1,342,645,813.79
  5. Step 5: Solve for x
    x = 1,342,645,813.79/55,970.78
  6. Step 6: Final answer
    x = 23,988.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.