Home / 128,265,243.78-192,397,931.28-31,220,967.90

Finding the Fourth Proportional to 128,265,243.78, 192,397,931.28 and 31,220,967.90

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Solution

The fourth proportional to 128,265,243.78, 192,397,931.28 and 31,220,967.90 is: 46,831,467.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,265,243.78 : 192,397,931.28 = 31,220,967.90 : x
  2. Step 2: Convert to fraction form
    128,265,243.78/192,397,931.28 = 31,220,967.90/x
  3. Step 3: Cross multiply
    128,265,243.78x = 192,397,931.28 × 31,220,967.90
  4. Step 4: Simplify right side
    128,265,243.78x = 6,006,849,636,519,286
  5. Step 5: Solve for x
    x = 6,006,849,636,519,286/128,265,243.78
  6. Step 6: Final answer
    x = 46,831,467.82

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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.