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Finding the Fourth Proportional to 388,049,212.80, 582,154,689.60 and 129,344,803.20

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Solution

The fourth proportional to 388,049,212.80, 582,154,689.60 and 129,344,803.20 is: 194,044,160.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,049,212.80 : 582,154,689.60 = 129,344,803.20 : x
  2. Step 2: Convert to fraction form
    388,049,212.80/582,154,689.60 = 129,344,803.20/x
  3. Step 3: Cross multiply
    388,049,212.80x = 582,154,689.60 × 129,344,803.20
  4. Step 4: Simplify right side
    388,049,212.80x = 75,298,683,758,269,088
  5. Step 5: Solve for x
    x = 75,298,683,758,269,088/388,049,212.80
  6. Step 6: Final answer
    x = 194,044,160.57

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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.