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Finding the Fourth Proportional to 66,603.12, 99,818.56 and 49,831.56

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Solution

The fourth proportional to 66,603.12, 99,818.56 and 49,831.56 is: 74,682.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,603.12 : 99,818.56 = 49,831.56 : x
  2. Step 2: Convert to fraction form
    66,603.12/99,818.56 = 49,831.56/x
  3. Step 3: Cross multiply
    66,603.12x = 99,818.56 × 49,831.56
  4. Step 4: Simplify right side
    66,603.12x = 4,974,114,561.75
  5. Step 5: Solve for x
    x = 4,974,114,561.75/66,603.12
  6. Step 6: Final answer
    x = 74,682.91

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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.