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Finding the Fourth Proportional to 103,710.38, 155,434.35 and 66,255.98

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Solution

The fourth proportional to 103,710.38, 155,434.35 and 66,255.98 is: 99,300.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,710.38 : 155,434.35 = 66,255.98 : x
  2. Step 2: Convert to fraction form
    103,710.38/155,434.35 = 66,255.98/x
  3. Step 3: Cross multiply
    103,710.38x = 155,434.35 × 66,255.98
  4. Step 4: Simplify right side
    103,710.38x = 10,298,455,184.91
  5. Step 5: Solve for x
    x = 10,298,455,184.91/103,710.38
  6. Step 6: Final answer
    x = 99,300.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.