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Finding the Fourth Proportional to 74,399.60, 102,689.16 and 42,586.88

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Solution

The fourth proportional to 74,399.60, 102,689.16 and 42,586.88 is: 58,780.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,399.60 : 102,689.16 = 42,586.88 : x
  2. Step 2: Convert to fraction form
    74,399.60/102,689.16 = 42,586.88/x
  3. Step 3: Cross multiply
    74,399.60x = 102,689.16 × 42,586.88
  4. Step 4: Simplify right side
    74,399.60x = 4,373,210,934.22
  5. Step 5: Solve for x
    x = 4,373,210,934.22/74,399.60
  6. Step 6: Final answer
    x = 58,780.03

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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.