Home / 74,312.74-102,546.56-40,780.90

Finding the Fourth Proportional to 74,312.74, 102,546.56 and 40,780.90

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Solution

The fourth proportional to 74,312.74, 102,546.56 and 40,780.90 is: 56,274.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,312.74 : 102,546.56 = 40,780.90 : x
  2. Step 2: Convert to fraction form
    74,312.74/102,546.56 = 40,780.90/x
  3. Step 3: Cross multiply
    74,312.74x = 102,546.56 × 40,780.90
  4. Step 4: Simplify right side
    74,312.74x = 4,181,941,008.70
  5. Step 5: Solve for x
    x = 4,181,941,008.70/74,312.74
  6. Step 6: Final answer
    x = 56,274.89

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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.