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Finding the Fourth Proportional to 66,266.40, 91,440.81 and 39,403.72

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Solution

The fourth proportional to 66,266.40, 91,440.81 and 39,403.72 is: 54,373.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,266.40 : 91,440.81 = 39,403.72 : x
  2. Step 2: Convert to fraction form
    66,266.40/91,440.81 = 39,403.72/x
  3. Step 3: Cross multiply
    66,266.40x = 91,440.81 × 39,403.72
  4. Step 4: Simplify right side
    66,266.40x = 3,603,108,188.11
  5. Step 5: Solve for x
    x = 3,603,108,188.11/66,266.40
  6. Step 6: Final answer
    x = 54,373.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.