Home / 128,960,239.20-193,440,358.80-99,734,920.80

Finding the Fourth Proportional to 128,960,239.20, 193,440,358.80 and 99,734,920.80

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Solution

The fourth proportional to 128,960,239.20, 193,440,358.80 and 99,734,920.80 is: 149,602,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,960,239.20 : 193,440,358.80 = 99,734,920.80 : x
  2. Step 2: Convert to fraction form
    128,960,239.20/193,440,358.80 = 99,734,920.80/x
  3. Step 3: Cross multiply
    128,960,239.20x = 193,440,358.80 × 99,734,920.80
  4. Step 4: Simplify right side
    128,960,239.20x = 19,292,758,864,441,584
  5. Step 5: Solve for x
    x = 19,292,758,864,441,584/128,960,239.20
  6. Step 6: Final answer
    x = 149,602,381.20

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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.