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Finding the Fourth Proportional to 66,679.70, 92,026.69 and 38,386.58

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Solution

The fourth proportional to 66,679.70, 92,026.69 and 38,386.58 is: 52,978.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,679.70 : 92,026.69 = 38,386.58 : x
  2. Step 2: Convert to fraction form
    66,679.70/92,026.69 = 38,386.58/x
  3. Step 3: Cross multiply
    66,679.70x = 92,026.69 × 38,386.58
  4. Step 4: Simplify right side
    66,679.70x = 3,532,589,897.82
  5. Step 5: Solve for x
    x = 3,532,589,897.82/66,679.70
  6. Step 6: Final answer
    x = 52,978.49

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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.