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Finding the Fourth Proportional to 251,642.70, 377,464.05 and 85,430.70

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Solution

The fourth proportional to 251,642.70, 377,464.05 and 85,430.70 is: 128,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,642.70 : 377,464.05 = 85,430.70 : x
  2. Step 2: Convert to fraction form
    251,642.70/377,464.05 = 85,430.70/x
  3. Step 3: Cross multiply
    251,642.70x = 377,464.05 × 85,430.70
  4. Step 4: Simplify right side
    251,642.70x = 32,247,018,016.34
  5. Step 5: Solve for x
    x = 32,247,018,016.34/251,642.70
  6. Step 6: Final answer
    x = 128,146.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.