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Finding the Fourth Proportional to 217,064,471.20, 325,596,706.80 and 130,971,029.20

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Solution

The fourth proportional to 217,064,471.20, 325,596,706.80 and 130,971,029.20 is: 196,456,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,064,471.20 : 325,596,706.80 = 130,971,029.20 : x
  2. Step 2: Convert to fraction form
    217,064,471.20/325,596,706.80 = 130,971,029.20/x
  3. Step 3: Cross multiply
    217,064,471.20x = 325,596,706.80 × 130,971,029.20
  4. Step 4: Simplify right side
    217,064,471.20x = 42,643,735,793,726,640
  5. Step 5: Solve for x
    x = 42,643,735,793,726,640/217,064,471.20
  6. Step 6: Final answer
    x = 196,456,543.80

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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.