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Finding the Fourth Proportional to 101,709.98, 140,368.09 and 56,402.18

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Solution

The fourth proportional to 101,709.98, 140,368.09 and 56,402.18 is: 77,839.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,709.98 : 140,368.09 = 56,402.18 : x
  2. Step 2: Convert to fraction form
    101,709.98/140,368.09 = 56,402.18/x
  3. Step 3: Cross multiply
    101,709.98x = 140,368.09 × 56,402.18
  4. Step 4: Simplify right side
    101,709.98x = 7,917,065,576.60
  5. Step 5: Solve for x
    x = 7,917,065,576.60/101,709.98
  6. Step 6: Final answer
    x = 77,839.61

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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.