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Finding the Fourth Proportional to 99,699.64, 149,577.71 and 40,577.74

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Solution

The fourth proportional to 99,699.64, 149,577.71 and 40,577.74 is: 60,878.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,699.64 : 149,577.71 = 40,577.74 : x
  2. Step 2: Convert to fraction form
    99,699.64/149,577.71 = 40,577.74/x
  3. Step 3: Cross multiply
    99,699.64x = 149,577.71 × 40,577.74
  4. Step 4: Simplify right side
    99,699.64x = 6,069,524,849.34
  5. Step 5: Solve for x
    x = 6,069,524,849.34/99,699.64
  6. Step 6: Final answer
    x = 60,878.10

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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.