Home / 103,013.60-155,222.31-84,703.78

Finding the Fourth Proportional to 103,013.60, 155,222.31 and 84,703.78

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Solution

The fourth proportional to 103,013.60, 155,222.31 and 84,703.78 is: 127,632.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,013.60 : 155,222.31 = 84,703.78 : x
  2. Step 2: Convert to fraction form
    103,013.60/155,222.31 = 84,703.78/x
  3. Step 3: Cross multiply
    103,013.60x = 155,222.31 × 84,703.78
  4. Step 4: Simplify right side
    103,013.60x = 13,147,916,909.00
  5. Step 5: Solve for x
    x = 13,147,916,909.00/103,013.60
  6. Step 6: Final answer
    x = 127,632.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.