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Finding the Fourth Proportional to 123,357.84, 170,237.15 and 74,943.29

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Solution

The fourth proportional to 123,357.84, 170,237.15 and 74,943.29 is: 103,423.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,357.84 : 170,237.15 = 74,943.29 : x
  2. Step 2: Convert to fraction form
    123,357.84/170,237.15 = 74,943.29/x
  3. Step 3: Cross multiply
    123,357.84x = 170,237.15 × 74,943.29
  4. Step 4: Simplify right side
    123,357.84x = 12,758,130,875.32
  5. Step 5: Solve for x
    x = 12,758,130,875.32/123,357.84
  6. Step 6: Final answer
    x = 103,423.75

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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.