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Finding the Fourth Proportional to 66,810.78, 92,210.75 and 39,956.24

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Solution

The fourth proportional to 66,810.78, 92,210.75 and 39,956.24 is: 55,146.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,810.78 : 92,210.75 = 39,956.24 : x
  2. Step 2: Convert to fraction form
    66,810.78/92,210.75 = 39,956.24/x
  3. Step 3: Cross multiply
    66,810.78x = 92,210.75 × 39,956.24
  4. Step 4: Simplify right side
    66,810.78x = 3,684,394,196.75
  5. Step 5: Solve for x
    x = 3,684,394,196.75/66,810.78
  6. Step 6: Final answer
    x = 55,146.70

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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.