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Finding the Fourth Proportional to 131,442.60, 181,409.60 and 74,859.24

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Solution

The fourth proportional to 131,442.60, 181,409.60 and 74,859.24 is: 103,316.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,442.60 : 181,409.60 = 74,859.24 : x
  2. Step 2: Convert to fraction form
    131,442.60/181,409.60 = 74,859.24/x
  3. Step 3: Cross multiply
    131,442.60x = 181,409.60 × 74,859.24
  4. Step 4: Simplify right side
    131,442.60x = 13,580,184,784.70
  5. Step 5: Solve for x
    x = 13,580,184,784.70/131,442.60
  6. Step 6: Final answer
    x = 103,316.47

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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.