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Finding the Fourth Proportional to 103,416.70, 155,125.05 and 67,987.30

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Solution

The fourth proportional to 103,416.70, 155,125.05 and 67,987.30 is: 101,980.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,416.70 : 155,125.05 = 67,987.30 : x
  2. Step 2: Convert to fraction form
    103,416.70/155,125.05 = 67,987.30/x
  3. Step 3: Cross multiply
    103,416.70x = 155,125.05 × 67,987.30
  4. Step 4: Simplify right side
    103,416.70x = 10,546,533,311.87
  5. Step 5: Solve for x
    x = 10,546,533,311.87/103,416.70
  6. Step 6: Final answer
    x = 101,980.95

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1.5x scale

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.