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Finding the Fourth Proportional to 99,700.37, 149,578.80 and 40,578.47

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Solution

The fourth proportional to 99,700.37, 149,578.80 and 40,578.47 is: 60,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,700.37 : 149,578.80 = 40,578.47 : x
  2. Step 2: Convert to fraction form
    99,700.37/149,578.80 = 40,578.47/x
  3. Step 3: Cross multiply
    99,700.37x = 149,578.80 × 40,578.47
  4. Step 4: Simplify right side
    99,700.37x = 6,069,678,848.44
  5. Step 5: Solve for x
    x = 6,069,678,848.44/99,700.37
  6. Step 6: Final answer
    x = 60,879.20

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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.