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Finding the Fourth Proportional to 74,940.95, 103,417.29 and 40,948.70

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Solution

The fourth proportional to 74,940.95, 103,417.29 and 40,948.70 is: 56,508.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,940.95 : 103,417.29 = 40,948.70 : x
  2. Step 2: Convert to fraction form
    74,940.95/103,417.29 = 40,948.70/x
  3. Step 3: Cross multiply
    74,940.95x = 103,417.29 × 40,948.70
  4. Step 4: Simplify right side
    74,940.95x = 4,234,803,065.94
  5. Step 5: Solve for x
    x = 4,234,803,065.94/74,940.95
  6. Step 6: Final answer
    x = 56,508.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.