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Finding the Fourth Proportional to 103,855.56, 143,320.74 and 56,108.88

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Solution

The fourth proportional to 103,855.56, 143,320.74 and 56,108.88 is: 77,430.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,855.56 : 143,320.74 = 56,108.88 : x
  2. Step 2: Convert to fraction form
    103,855.56/143,320.74 = 56,108.88/x
  3. Step 3: Cross multiply
    103,855.56x = 143,320.74 × 56,108.88
  4. Step 4: Simplify right side
    103,855.56x = 8,041,566,202.17
  5. Step 5: Solve for x
    x = 8,041,566,202.17/103,855.56
  6. Step 6: Final answer
    x = 77,430.29

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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.