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Finding the Fourth Proportional to 103,999.89, 155,693.66 and 64,429.77

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Solution

The fourth proportional to 103,999.89, 155,693.66 and 64,429.77 is: 96,454.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,999.89 : 155,693.66 = 64,429.77 : x
  2. Step 2: Convert to fraction form
    103,999.89/155,693.66 = 64,429.77/x
  3. Step 3: Cross multiply
    103,999.89x = 155,693.66 × 64,429.77
  4. Step 4: Simplify right side
    103,999.89x = 10,031,306,382.11
  5. Step 5: Solve for x
    x = 10,031,306,382.11/103,999.89
  6. Step 6: Final answer
    x = 96,454.97

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1.5x scale

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.