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Finding the Fourth Proportional to 84,368.98, 126,510.32 and 28,188.82

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Solution

The fourth proportional to 84,368.98, 126,510.32 and 28,188.82 is: 42,268.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,368.98 : 126,510.32 = 28,188.82 : x
  2. Step 2: Convert to fraction form
    84,368.98/126,510.32 = 28,188.82/x
  3. Step 3: Cross multiply
    84,368.98x = 126,510.32 × 28,188.82
  4. Step 4: Simplify right side
    84,368.98x = 3,566,176,638.62
  5. Step 5: Solve for x
    x = 3,566,176,638.62/84,368.98
  6. Step 6: Final answer
    x = 42,268.81

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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.