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Finding the Fourth Proportional to 131,140.69, 181,039.51 and 85,888.01

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Solution

The fourth proportional to 131,140.69, 181,039.51 and 85,888.01 is: 118,568.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,140.69 : 181,039.51 = 85,888.01 : x
  2. Step 2: Convert to fraction form
    131,140.69/181,039.51 = 85,888.01/x
  3. Step 3: Cross multiply
    131,140.69x = 181,039.51 × 85,888.01
  4. Step 4: Simplify right side
    131,140.69x = 15,549,123,245.28
  5. Step 5: Solve for x
    x = 15,549,123,245.28/131,140.69
  6. Step 6: Final answer
    x = 118,568.26

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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.