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Finding the Fourth Proportional to 103,687.60, 155,403.40 and 70,407.60

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Solution

The fourth proportional to 103,687.60, 155,403.40 and 70,407.60 is: 105,524.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,687.60 : 155,403.40 = 70,407.60 : x
  2. Step 2: Convert to fraction form
    103,687.60/155,403.40 = 70,407.60/x
  3. Step 3: Cross multiply
    103,687.60x = 155,403.40 × 70,407.60
  4. Step 4: Simplify right side
    103,687.60x = 10,941,580,425.84
  5. Step 5: Solve for x
    x = 10,941,580,425.84/103,687.60
  6. Step 6: Final answer
    x = 105,524.48

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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.