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Finding the Fourth Proportional to 74,687.88, 103,051.20 and 42,415.32

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Solution

The fourth proportional to 74,687.88, 103,051.20 and 42,415.32 is: 58,522.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,687.88 : 103,051.20 = 42,415.32 : x
  2. Step 2: Convert to fraction form
    74,687.88/103,051.20 = 42,415.32/x
  3. Step 3: Cross multiply
    74,687.88x = 103,051.20 × 42,415.32
  4. Step 4: Simplify right side
    74,687.88x = 4,370,949,624.38
  5. Step 5: Solve for x
    x = 4,370,949,624.38/74,687.88
  6. Step 6: Final answer
    x = 58,522.88

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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.