Home / 128,145.90-192,218.85-118,814.70

Finding the Fourth Proportional to 128,145.90, 192,218.85 and 118,814.70

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Solution

The fourth proportional to 128,145.90, 192,218.85 and 118,814.70 is: 178,222.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.90 : 192,218.85 = 118,814.70 : x
  2. Step 2: Convert to fraction form
    128,145.90/192,218.85 = 118,814.70/x
  3. Step 3: Cross multiply
    128,145.90x = 192,218.85 × 118,814.70
  4. Step 4: Simplify right side
    128,145.90x = 22,838,424,997.10
  5. Step 5: Solve for x
    x = 22,838,424,997.10/128,145.90
  6. Step 6: Final answer
    x = 178,222.05

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1.5x scale

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.