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Finding the Fourth Proportional to 78,880,340.30, 118,096,561.65 and 78,880,340.30

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Solution

The fourth proportional to 78,880,340.30, 118,096,561.65 and 78,880,340.30 is: 118,096,561.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880,340.30 : 118,096,561.65 = 78,880,340.30 : x
  2. Step 2: Convert to fraction form
    78,880,340.30/118,096,561.65 = 78,880,340.30/x
  3. Step 3: Cross multiply
    78,880,340.30x = 118,096,561.65 × 78,880,340.30
  4. Step 4: Simplify right side
    78,880,340.30x = 9,315,496,971,211,930
  5. Step 5: Solve for x
    x = 9,315,496,971,211,930/78,880,340.30
  6. Step 6: Final answer
    x = 118,096,561.65

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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.