Home / 209,953,828.80-314,930,743.20-129,220,286.40

Finding the Fourth Proportional to 209,953,828.80, 314,930,743.20 and 129,220,286.40

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Solution

The fourth proportional to 209,953,828.80, 314,930,743.20 and 129,220,286.40 is: 193,830,429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,953,828.80 : 314,930,743.20 = 129,220,286.40 : x
  2. Step 2: Convert to fraction form
    209,953,828.80/314,930,743.20 = 129,220,286.40/x
  3. Step 3: Cross multiply
    209,953,828.80x = 314,930,743.20 × 129,220,286.40
  4. Step 4: Simplify right side
    209,953,828.80x = 40,695,440,832,468,856
  5. Step 5: Solve for x
    x = 40,695,440,832,468,856/209,953,828.80
  6. Step 6: Final answer
    x = 193,830,429.60

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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.