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Finding the Fourth Proportional to 74,685.60, 103,065.66 and 40,696.08

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Solution

The fourth proportional to 74,685.60, 103,065.66 and 40,696.08 is: 56,160.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,685.60 : 103,065.66 = 40,696.08 : x
  2. Step 2: Convert to fraction form
    74,685.60/103,065.66 = 40,696.08/x
  3. Step 3: Cross multiply
    74,685.60x = 103,065.66 × 40,696.08
  4. Step 4: Simplify right side
    74,685.60x = 4,194,368,344.61
  5. Step 5: Solve for x
    x = 4,194,368,344.61/74,685.60
  6. Step 6: Final answer
    x = 56,160.34

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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.