Home / 128,306,031.30-192,081,133.35-120,831,740.10

Finding the Fourth Proportional to 128,306,031.30, 192,081,133.35 and 120,831,740.10

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Solution

The fourth proportional to 128,306,031.30, 192,081,133.35 and 120,831,740.10 is: 180,891,711.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,306,031.30 : 192,081,133.35 = 120,831,740.10 : x
  2. Step 2: Convert to fraction form
    128,306,031.30/192,081,133.35 = 120,831,740.10/x
  3. Step 3: Cross multiply
    128,306,031.30x = 192,081,133.35 × 120,831,740.10
  4. Step 4: Simplify right side
    128,306,031.30x = 23,209,497,583,060,640
  5. Step 5: Solve for x
    x = 23,209,497,583,060,640/128,306,031.30
  6. Step 6: Final answer
    x = 180,891,711.39

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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.