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Finding the Fourth Proportional to 74,400.88, 102,678.96 and 42,579.76

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Solution

The fourth proportional to 74,400.88, 102,678.96 and 42,579.76 is: 58,763.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,400.88 : 102,678.96 = 42,579.76 : x
  2. Step 2: Convert to fraction form
    74,400.88/102,678.96 = 42,579.76/x
  3. Step 3: Cross multiply
    74,400.88x = 102,678.96 × 42,579.76
  4. Step 4: Simplify right side
    74,400.88x = 4,372,045,473.85
  5. Step 5: Solve for x
    x = 4,372,045,473.85/74,400.88
  6. Step 6: Final answer
    x = 58,763.36

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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.