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Finding the Fourth Proportional to 140,561.70, 210,915.45 and 61,683.90

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Solution

The fourth proportional to 140,561.70, 210,915.45 and 61,683.90 is: 92,557.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,561.70 : 210,915.45 = 61,683.90 : x
  2. Step 2: Convert to fraction form
    140,561.70/210,915.45 = 61,683.90/x
  3. Step 3: Cross multiply
    140,561.70x = 210,915.45 × 61,683.90
  4. Step 4: Simplify right side
    140,561.70x = 13,010,087,526.26
  5. Step 5: Solve for x
    x = 13,010,087,526.26/140,561.70
  6. Step 6: Final answer
    x = 92,557.84

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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.