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Finding the Fourth Proportional to 103,369.68, 142,703.30 and 88,422.91

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Solution

The fourth proportional to 103,369.68, 142,703.30 and 88,422.91 is: 122,069.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,369.68 : 142,703.30 = 88,422.91 : x
  2. Step 2: Convert to fraction form
    103,369.68/142,703.30 = 88,422.91/x
  3. Step 3: Cross multiply
    103,369.68x = 142,703.30 × 88,422.91
  4. Step 4: Simplify right side
    103,369.68x = 12,618,240,916.90
  5. Step 5: Solve for x
    x = 12,618,240,916.90/103,369.68
  6. Step 6: Final answer
    x = 122,069.07

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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.