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Finding the Fourth Proportional to 74,698.88, 103,084.48 and 40,707.40

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Solution

The fourth proportional to 74,698.88, 103,084.48 and 40,707.40 is: 56,176.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,698.88 : 103,084.48 = 40,707.40 : x
  2. Step 2: Convert to fraction form
    74,698.88/103,084.48 = 40,707.40/x
  3. Step 3: Cross multiply
    74,698.88x = 103,084.48 × 40,707.40
  4. Step 4: Simplify right side
    74,698.88x = 4,196,300,801.67
  5. Step 5: Solve for x
    x = 4,196,300,801.67/74,698.88
  6. Step 6: Final answer
    x = 56,176.22

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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.