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Finding the Fourth Proportional to 66,665.88, 91,955.34 and 42,754.68

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Solution

The fourth proportional to 66,665.88, 91,955.34 and 42,754.68 is: 58,973.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,665.88 : 91,955.34 = 42,754.68 : x
  2. Step 2: Convert to fraction form
    66,665.88/91,955.34 = 42,754.68/x
  3. Step 3: Cross multiply
    66,665.88x = 91,955.34 × 42,754.68
  4. Step 4: Simplify right side
    66,665.88x = 3,931,521,135.99
  5. Step 5: Solve for x
    x = 3,931,521,135.99/66,665.88
  6. Step 6: Final answer
    x = 58,973.51

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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.