Home / 128,136,820.78-176,844,344.07-72,384,592.06

Finding the Fourth Proportional to 128,136,820.78, 176,844,344.07 and 72,384,592.06

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Solution

The fourth proportional to 128,136,820.78, 176,844,344.07 and 72,384,592.06 is: 99,899,510.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,136,820.78 : 176,844,344.07 = 72,384,592.06 : x
  2. Step 2: Convert to fraction form
    128,136,820.78/176,844,344.07 = 72,384,592.06/x
  3. Step 3: Cross multiply
    128,136,820.78x = 176,844,344.07 × 72,384,592.06
  4. Step 4: Simplify right side
    128,136,820.78x = 12,800,805,703,625,230
  5. Step 5: Solve for x
    x = 12,800,805,703,625,230/128,136,820.78
  6. Step 6: Final answer
    x = 99,899,510.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.