Home / 219,238,934.40-328,858,401.60-128,465,020.80

Finding the Fourth Proportional to 219,238,934.40, 328,858,401.60 and 128,465,020.80

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Solution

The fourth proportional to 219,238,934.40, 328,858,401.60 and 128,465,020.80 is: 192,697,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,238,934.40 : 328,858,401.60 = 128,465,020.80 : x
  2. Step 2: Convert to fraction form
    219,238,934.40/328,858,401.60 = 128,465,020.80/x
  3. Step 3: Cross multiply
    219,238,934.40x = 328,858,401.60 × 128,465,020.80
  4. Step 4: Simplify right side
    219,238,934.40x = 42,246,801,401,798,752
  5. Step 5: Solve for x
    x = 42,246,801,401,798,752/219,238,934.40
  6. Step 6: Final answer
    x = 192,697,531.20

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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.