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Finding the Fourth Proportional to 190,312.51, 285,468.77 and 79,426.75

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Solution

The fourth proportional to 190,312.51, 285,468.77 and 79,426.75 is: 119,140.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,312.51 : 285,468.77 = 79,426.75 : x
  2. Step 2: Convert to fraction form
    190,312.51/285,468.77 = 79,426.75/x
  3. Step 3: Cross multiply
    190,312.51x = 285,468.77 × 79,426.75
  4. Step 4: Simplify right side
    190,312.51x = 22,673,856,627.60
  5. Step 5: Solve for x
    x = 22,673,856,627.60/190,312.51
  6. Step 6: Final answer
    x = 119,140.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.