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Finding the Fourth Proportional to 74,763.81, 112,178.52 and 51,428.52

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Solution

The fourth proportional to 74,763.81, 112,178.52 and 51,428.52 is: 77,165.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,763.81 : 112,178.52 = 51,428.52 : x
  2. Step 2: Convert to fraction form
    74,763.81/112,178.52 = 51,428.52/x
  3. Step 3: Cross multiply
    74,763.81x = 112,178.52 × 51,428.52
  4. Step 4: Simplify right side
    74,763.81x = 5,769,175,259.39
  5. Step 5: Solve for x
    x = 5,769,175,259.39/74,763.81
  6. Step 6: Final answer
    x = 77,165.35

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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.