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Finding the Fourth Proportional to 140,559.70, 210,912.45 and 61,681.90

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Solution

The fourth proportional to 140,559.70, 210,912.45 and 61,681.90 is: 92,554.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,559.70 : 210,912.45 = 61,681.90 : x
  2. Step 2: Convert to fraction form
    140,559.70/210,912.45 = 61,681.90/x
  3. Step 3: Cross multiply
    140,559.70x = 210,912.45 × 61,681.90
  4. Step 4: Simplify right side
    140,559.70x = 13,009,480,649.66
  5. Step 5: Solve for x
    x = 13,009,480,649.66/140,559.70
  6. Step 6: Final answer
    x = 92,554.84

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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.