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Finding the Fourth Proportional to 103,615.40, 155,416.08 and 40,423.88

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Solution

The fourth proportional to 103,615.40, 155,416.08 and 40,423.88 is: 60,633.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.40 : 155,416.08 = 40,423.88 : x
  2. Step 2: Convert to fraction form
    103,615.40/155,416.08 = 40,423.88/x
  3. Step 3: Cross multiply
    103,615.40x = 155,416.08 × 40,423.88
  4. Step 4: Simplify right side
    103,615.40x = 6,282,520,967.99
  5. Step 5: Solve for x
    x = 6,282,520,967.99/103,615.40
  6. Step 6: Final answer
    x = 60,633.08

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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.