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Finding the Fourth Proportional to 74,948.59, 112,389.94 and 39,879.91

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Solution

The fourth proportional to 74,948.59, 112,389.94 and 39,879.91 is: 59,802.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,948.59 : 112,389.94 = 39,879.91 : x
  2. Step 2: Convert to fraction form
    74,948.59/112,389.94 = 39,879.91/x
  3. Step 3: Cross multiply
    74,948.59x = 112,389.94 × 39,879.91
  4. Step 4: Simplify right side
    74,948.59x = 4,482,100,692.11
  5. Step 5: Solve for x
    x = 4,482,100,692.11/74,948.59
  6. Step 6: Final answer
    x = 59,802.34

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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.