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Finding the Fourth Proportional to 66,921.90, 92,369.01 and 45,447.99

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Solution

The fourth proportional to 66,921.90, 92,369.01 and 45,447.99 is: 62,729.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,921.90 : 92,369.01 = 45,447.99 : x
  2. Step 2: Convert to fraction form
    66,921.90/92,369.01 = 45,447.99/x
  3. Step 3: Cross multiply
    66,921.90x = 92,369.01 × 45,447.99
  4. Step 4: Simplify right side
    66,921.90x = 4,197,985,411.19
  5. Step 5: Solve for x
    x = 4,197,985,411.19/66,921.90
  6. Step 6: Final answer
    x = 62,729.62

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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.