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Finding the Fourth Proportional to 66,931.90, 92,428.50 and 43,100.08

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Solution

The fourth proportional to 66,931.90, 92,428.50 and 43,100.08 is: 59,518.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,931.90 : 92,428.50 = 43,100.08 : x
  2. Step 2: Convert to fraction form
    66,931.90/92,428.50 = 43,100.08/x
  3. Step 3: Cross multiply
    66,931.90x = 92,428.50 × 43,100.08
  4. Step 4: Simplify right side
    66,931.90x = 3,983,675,744.28
  5. Step 5: Solve for x
    x = 3,983,675,744.28/66,931.90
  6. Step 6: Final answer
    x = 59,518.34

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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.