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Finding the Fourth Proportional to 66,439.94, 91,612.63 and 54,302.76

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Solution

The fourth proportional to 66,439.94, 91,612.63 and 54,302.76 is: 74,876.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,439.94 : 91,612.63 = 54,302.76 : x
  2. Step 2: Convert to fraction form
    66,439.94/91,612.63 = 54,302.76/x
  3. Step 3: Cross multiply
    66,439.94x = 91,612.63 × 54,302.76
  4. Step 4: Simplify right side
    66,439.94x = 4,974,818,829.55
  5. Step 5: Solve for x
    x = 4,974,818,829.55/66,439.94
  6. Step 6: Final answer
    x = 74,876.93

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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.