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Finding the Fourth Proportional to 74,689.64, 103,065.54 and 46,389.80

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Solution

The fourth proportional to 74,689.64, 103,065.54 and 46,389.80 is: 64,014.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.64 : 103,065.54 = 46,389.80 : x
  2. Step 2: Convert to fraction form
    74,689.64/103,065.54 = 46,389.80/x
  3. Step 3: Cross multiply
    74,689.64x = 103,065.54 × 46,389.80
  4. Step 4: Simplify right side
    74,689.64x = 4,781,189,787.49
  5. Step 5: Solve for x
    x = 4,781,189,787.49/74,689.64
  6. Step 6: Final answer
    x = 64,014.10

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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.