Home / 135,803.13-187,424.93-78,442.40

Finding the Fourth Proportional to 135,803.13, 187,424.93 and 78,442.40

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Solution

The fourth proportional to 135,803.13, 187,424.93 and 78,442.40 is: 108,260.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,803.13 : 187,424.93 = 78,442.40 : x
  2. Step 2: Convert to fraction form
    135,803.13/187,424.93 = 78,442.40/x
  3. Step 3: Cross multiply
    135,803.13x = 187,424.93 × 78,442.40
  4. Step 4: Simplify right side
    135,803.13x = 14,702,061,329.03
  5. Step 5: Solve for x
    x = 14,702,061,329.03/135,803.13
  6. Step 6: Final answer
    x = 108,260.11

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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.