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Finding the Fourth Proportional to 68,412.40, 102,424.20 and 60,636.40

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Solution

The fourth proportional to 68,412.40, 102,424.20 and 60,636.40 is: 90,782.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,412.40 : 102,424.20 = 60,636.40 : x
  2. Step 2: Convert to fraction form
    68,412.40/102,424.20 = 60,636.40/x
  3. Step 3: Cross multiply
    68,412.40x = 102,424.20 × 60,636.40
  4. Step 4: Simplify right side
    68,412.40x = 6,210,634,760.88
  5. Step 5: Solve for x
    x = 6,210,634,760.88/68,412.40
  6. Step 6: Final answer
    x = 90,782.30

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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.