Home / 128,105,816.70-192,158,725.05-121,835,250.30

Finding the Fourth Proportional to 128,105,816.70, 192,158,725.05 and 121,835,250.30

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Solution

The fourth proportional to 128,105,816.70, 192,158,725.05 and 121,835,250.30 is: 182,752,875.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105,816.70 : 192,158,725.05 = 121,835,250.30 : x
  2. Step 2: Convert to fraction form
    128,105,816.70/192,158,725.05 = 121,835,250.30/x
  3. Step 3: Cross multiply
    128,105,816.70x = 192,158,725.05 × 121,835,250.30
  4. Step 4: Simplify right side
    128,105,816.70x = 23,411,706,363,795,632
  5. Step 5: Solve for x
    x = 23,411,706,363,795,632/128,105,816.70
  6. Step 6: Final answer
    x = 182,752,875.45

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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.