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Finding the Fourth Proportional to 79,716,728.80, 119,386,136.40 and 79,716,728.80

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Solution

The fourth proportional to 79,716,728.80, 119,386,136.40 and 79,716,728.80 is: 119,386,136.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,716,728.80 : 119,386,136.40 = 79,716,728.80 : x
  2. Step 2: Convert to fraction form
    79,716,728.80/119,386,136.40 = 79,716,728.80/x
  3. Step 3: Cross multiply
    79,716,728.80x = 119,386,136.40 × 79,716,728.80
  4. Step 4: Simplify right side
    79,716,728.80x = 9,517,072,257,878,608
  5. Step 5: Solve for x
    x = 9,517,072,257,878,608/79,716,728.80
  6. Step 6: Final answer
    x = 119,386,136.40

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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.