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Finding the Fourth Proportional to 74,872.79, 103,323.67 and 40,881.17

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Solution

The fourth proportional to 74,872.79, 103,323.67 and 40,881.17 is: 56,415.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,872.79 : 103,323.67 = 40,881.17 : x
  2. Step 2: Convert to fraction form
    74,872.79/103,323.67 = 40,881.17/x
  3. Step 3: Cross multiply
    74,872.79x = 103,323.67 × 40,881.17
  4. Step 4: Simplify right side
    74,872.79x = 4,223,992,518.29
  5. Step 5: Solve for x
    x = 4,223,992,518.29/74,872.79
  6. Step 6: Final answer
    x = 56,415.59

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1.5x scale

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.