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Finding the Fourth Proportional to 103,368.70, 155,058.35 and 28,487.19

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Solution

The fourth proportional to 103,368.70, 155,058.35 and 28,487.19 is: 42,732.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,368.70 : 155,058.35 = 28,487.19 : x
  2. Step 2: Convert to fraction form
    103,368.70/155,058.35 = 28,487.19/x
  3. Step 3: Cross multiply
    103,368.70x = 155,058.35 × 28,487.19
  4. Step 4: Simplify right side
    103,368.70x = 4,417,176,677.54
  5. Step 5: Solve for x
    x = 4,417,176,677.54/103,368.70
  6. Step 6: Final answer
    x = 42,732.25

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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.