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Finding the Fourth Proportional to 85,522.41, 128,170.62 and 61,908.93

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Solution

The fourth proportional to 85,522.41, 128,170.62 and 61,908.93 is: 92,781.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,522.41 : 128,170.62 = 61,908.93 : x
  2. Step 2: Convert to fraction form
    85,522.41/128,170.62 = 61,908.93/x
  3. Step 3: Cross multiply
    85,522.41x = 128,170.62 × 61,908.93
  4. Step 4: Simplify right side
    85,522.41x = 7,934,905,941.64
  5. Step 5: Solve for x
    x = 7,934,905,941.64/85,522.41
  6. Step 6: Final answer
    x = 92,781.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.