Home / 123,531.45-170,345.19-105,685.53

Finding the Fourth Proportional to 123,531.45, 170,345.19 and 105,685.53

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Solution

The fourth proportional to 123,531.45, 170,345.19 and 105,685.53 is: 145,736.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,531.45 : 170,345.19 = 105,685.53 : x
  2. Step 2: Convert to fraction form
    123,531.45/170,345.19 = 105,685.53/x
  3. Step 3: Cross multiply
    123,531.45x = 170,345.19 × 105,685.53
  4. Step 4: Simplify right side
    123,531.45x = 18,003,021,688.10
  5. Step 5: Solve for x
    x = 18,003,021,688.10/123,531.45
  6. Step 6: Final answer
    x = 145,736.34

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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.