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Finding the Fourth Proportional to 66,402.77, 99,603.94 and 20,813.94

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Solution

The fourth proportional to 66,402.77, 99,603.94 and 20,813.94 is: 31,220.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,402.77 : 99,603.94 = 20,813.94 : x
  2. Step 2: Convert to fraction form
    66,402.77/99,603.94 = 20,813.94/x
  3. Step 3: Cross multiply
    66,402.77x = 99,603.94 × 20,813.94
  4. Step 4: Simplify right side
    66,402.77x = 2,073,150,430.92
  5. Step 5: Solve for x
    x = 2,073,150,430.92/66,402.77
  6. Step 6: Final answer
    x = 31,220.84

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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.