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Finding the Fourth Proportional to 66,037.16, 91,117.26 and 39,188.40

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Solution

The fourth proportional to 66,037.16, 91,117.26 and 39,188.40 is: 54,071.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,037.16 : 91,117.26 = 39,188.40 : x
  2. Step 2: Convert to fraction form
    66,037.16/91,117.26 = 39,188.40/x
  3. Step 3: Cross multiply
    66,037.16x = 91,117.26 × 39,188.40
  4. Step 4: Simplify right side
    66,037.16x = 3,570,739,631.78
  5. Step 5: Solve for x
    x = 3,570,739,631.78/66,037.16
  6. Step 6: Final answer
    x = 54,071.68

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