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Finding the Fourth Proportional to 101,808.15, 140,488.56 and 56,486.01

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Solution

The fourth proportional to 101,808.15, 140,488.56 and 56,486.01 is: 77,946.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,808.15 : 140,488.56 = 56,486.01 : x
  2. Step 2: Convert to fraction form
    101,808.15/140,488.56 = 56,486.01/x
  3. Step 3: Cross multiply
    101,808.15x = 140,488.56 × 56,486.01
  4. Step 4: Simplify right side
    101,808.15x = 7,935,638,205.05
  5. Step 5: Solve for x
    x = 7,935,638,205.05/101,808.15
  6. Step 6: Final answer
    x = 77,946.98

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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.