Home / 131,389.87-181,319.40-74,804.89

Finding the Fourth Proportional to 131,389.87, 181,319.40 and 74,804.89

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Solution

The fourth proportional to 131,389.87, 181,319.40 and 74,804.89 is: 103,231.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,389.87 : 181,319.40 = 74,804.89 : x
  2. Step 2: Convert to fraction form
    131,389.87/181,319.40 = 74,804.89/x
  3. Step 3: Cross multiply
    131,389.87x = 181,319.40 × 74,804.89
  4. Step 4: Simplify right side
    131,389.87x = 13,563,577,771.87
  5. Step 5: Solve for x
    x = 13,563,577,771.87/131,389.87
  6. Step 6: Final answer
    x = 103,231.53

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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.