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Finding the Fourth Proportional to 209,952,012.80, 314,928,019.20 and 132,857,638.40

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Solution

The fourth proportional to 209,952,012.80, 314,928,019.20 and 132,857,638.40 is: 199,286,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,952,012.80 : 314,928,019.20 = 132,857,638.40 : x
  2. Step 2: Convert to fraction form
    209,952,012.80/314,928,019.20 = 132,857,638.40/x
  3. Step 3: Cross multiply
    209,952,012.80x = 314,928,019.20 × 132,857,638.40
  4. Step 4: Simplify right side
    209,952,012.80x = 41,840,592,896,901,856
  5. Step 5: Solve for x
    x = 41,840,592,896,901,856/209,952,012.80
  6. Step 6: Final answer
    x = 199,286,457.60

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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.