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Finding the Fourth Proportional to 156,661.80, 234,992.70 and 77,929.80

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Solution

The fourth proportional to 156,661.80, 234,992.70 and 77,929.80 is: 116,894.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,661.80 : 234,992.70 = 77,929.80 : x
  2. Step 2: Convert to fraction form
    156,661.80/234,992.70 = 77,929.80/x
  3. Step 3: Cross multiply
    156,661.80x = 234,992.70 × 77,929.80
  4. Step 4: Simplify right side
    156,661.80x = 18,312,934,112.46
  5. Step 5: Solve for x
    x = 18,312,934,112.46/156,661.80
  6. Step 6: Final answer
    x = 116,894.70

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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.