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Finding the Fourth Proportional to 99,990.59, 149,985.98 and 40,046.06

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Solution

The fourth proportional to 99,990.59, 149,985.98 and 40,046.06 is: 60,069.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,990.59 : 149,985.98 = 40,046.06 : x
  2. Step 2: Convert to fraction form
    99,990.59/149,985.98 = 40,046.06/x
  3. Step 3: Cross multiply
    99,990.59x = 149,985.98 × 40,046.06
  4. Step 4: Simplify right side
    99,990.59x = 6,006,347,879.15
  5. Step 5: Solve for x
    x = 6,006,347,879.15/99,990.59
  6. Step 6: Final answer
    x = 60,069.13

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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.