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Finding the Fourth Proportional to 74,901.70, 103,365.18 and 40,911.20

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Solution

The fourth proportional to 74,901.70, 103,365.18 and 40,911.20 is: 56,457.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,901.70 : 103,365.18 = 40,911.20 : x
  2. Step 2: Convert to fraction form
    74,901.70/103,365.18 = 40,911.20/x
  3. Step 3: Cross multiply
    74,901.70x = 103,365.18 × 40,911.20
  4. Step 4: Simplify right side
    74,901.70x = 4,228,793,552.02
  5. Step 5: Solve for x
    x = 4,228,793,552.02/74,901.70
  6. Step 6: Final answer
    x = 56,457.91

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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.