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Finding the Fourth Proportional to 103,855.66, 143,320.82 and 56,109.01

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Solution

The fourth proportional to 103,855.66, 143,320.82 and 56,109.01 is: 77,430.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,855.66 : 143,320.82 = 56,109.01 : x
  2. Step 2: Convert to fraction form
    103,855.66/143,320.82 = 56,109.01/x
  3. Step 3: Cross multiply
    103,855.66x = 143,320.82 × 56,109.01
  4. Step 4: Simplify right side
    103,855.66x = 8,041,588,683.74
  5. Step 5: Solve for x
    x = 8,041,588,683.74/103,855.66
  6. Step 6: Final answer
    x = 77,430.43

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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.