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Finding the Fourth Proportional to 190,141.92, 285,155.28 and 79,308

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Solution

The fourth proportional to 190,141.92, 285,155.28 and 79,308 is: 118,937.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,141.92 : 285,155.28 = 79,308 : x
  2. Step 2: Convert to fraction form
    190,141.92/285,155.28 = 79,308/x
  3. Step 3: Cross multiply
    190,141.92x = 285,155.28 × 79,308
  4. Step 4: Simplify right side
    190,141.92x = 22,615,094,946.24
  5. Step 5: Solve for x
    x = 22,615,094,946.24/190,141.92
  6. Step 6: Final answer
    x = 118,937.98

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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.