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Finding the Fourth Proportional to 74,342.64, 102,590.10 and 40,350.40

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Solution

The fourth proportional to 74,342.64, 102,590.10 and 40,350.40 is: 55,682.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,342.64 : 102,590.10 = 40,350.40 : x
  2. Step 2: Convert to fraction form
    74,342.64/102,590.10 = 40,350.40/x
  3. Step 3: Cross multiply
    74,342.64x = 102,590.10 × 40,350.40
  4. Step 4: Simplify right side
    74,342.64x = 4,139,551,314.56
  5. Step 5: Solve for x
    x = 4,139,551,314.56/74,342.64
  6. Step 6: Final answer
    x = 55,682.06

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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.