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Finding the Fourth Proportional to 103,855.70, 143,320.83 and 56,109.04

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Solution

The fourth proportional to 103,855.70, 143,320.83 and 56,109.04 is: 77,430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,855.70 : 143,320.83 = 56,109.04 : x
  2. Step 2: Convert to fraction form
    103,855.70/143,320.83 = 56,109.04/x
  3. Step 3: Cross multiply
    103,855.70x = 143,320.83 × 56,109.04
  4. Step 4: Simplify right side
    103,855.70x = 8,041,593,614.59
  5. Step 5: Solve for x
    x = 8,041,593,614.59/103,855.70
  6. Step 6: Final answer
    x = 77,430.45

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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.