Home / 123,743.36-170,681.28-79,011.20

Finding the Fourth Proportional to 123,743.36, 170,681.28 and 79,011.20

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Solution

The fourth proportional to 123,743.36, 170,681.28 and 79,011.20 is: 108,981.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,743.36 : 170,681.28 = 79,011.20 : x
  2. Step 2: Convert to fraction form
    123,743.36/170,681.28 = 79,011.20/x
  3. Step 3: Cross multiply
    123,743.36x = 170,681.28 × 79,011.20
  4. Step 4: Simplify right side
    123,743.36x = 13,485,732,750.34
  5. Step 5: Solve for x
    x = 13,485,732,750.34/123,743.36
  6. Step 6: Final answer
    x = 108,981.47

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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.