Home / 128,323,971.40-192,485,957.10-123,789,008.20

Finding the Fourth Proportional to 128,323,971.40, 192,485,957.10 and 123,789,008.20

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Solution

The fourth proportional to 128,323,971.40, 192,485,957.10 and 123,789,008.20 is: 185,683,512.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,323,971.40 : 192,485,957.10 = 123,789,008.20 : x
  2. Step 2: Convert to fraction form
    128,323,971.40/192,485,957.10 = 123,789,008.20/x
  3. Step 3: Cross multiply
    128,323,971.40x = 192,485,957.10 × 123,789,008.20
  4. Step 4: Simplify right side
    128,323,971.40x = 23,827,645,721,836,748
  5. Step 5: Solve for x
    x = 23,827,645,721,836,748/128,323,971.40
  6. Step 6: Final answer
    x = 185,683,512.30

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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.