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Finding the Fourth Proportional to 66,470.63, 91,677.60 and 42,599.51

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Solution

The fourth proportional to 66,470.63, 91,677.60 and 42,599.51 is: 58,754.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,470.63 : 91,677.60 = 42,599.51 : x
  2. Step 2: Convert to fraction form
    66,470.63/91,677.60 = 42,599.51/x
  3. Step 3: Cross multiply
    66,470.63x = 91,677.60 × 42,599.51
  4. Step 4: Simplify right side
    66,470.63x = 3,905,420,837.98
  5. Step 5: Solve for x
    x = 3,905,420,837.98/66,470.63
  6. Step 6: Final answer
    x = 58,754.08

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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.