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Finding the Fourth Proportional to 103,985.70, 155,686.95 and 101,069.70

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Solution

The fourth proportional to 103,985.70, 155,686.95 and 101,069.70 is: 151,321.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,985.70 : 155,686.95 = 101,069.70 : x
  2. Step 2: Convert to fraction form
    103,985.70/155,686.95 = 101,069.70/x
  3. Step 3: Cross multiply
    103,985.70x = 155,686.95 × 101,069.70
  4. Step 4: Simplify right side
    103,985.70x = 15,735,233,330.42
  5. Step 5: Solve for x
    x = 15,735,233,330.42/103,985.70
  6. Step 6: Final answer
    x = 151,321.13

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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.