Home / 258,058,838.40-387,121,435.20-128,732,553.60

Finding the Fourth Proportional to 258,058,838.40, 387,121,435.20 and 128,732,553.60

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Solution

The fourth proportional to 258,058,838.40, 387,121,435.20 and 128,732,553.60 is: 193,115,381.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,058,838.40 : 387,121,435.20 = 128,732,553.60 : x
  2. Step 2: Convert to fraction form
    258,058,838.40/387,121,435.20 = 128,732,553.60/x
  3. Step 3: Cross multiply
    258,058,838.40x = 387,121,435.20 × 128,732,553.60
  4. Step 4: Simplify right side
    258,058,838.40x = 49,835,130,906,592,920
  5. Step 5: Solve for x
    x = 49,835,130,906,592,920/258,058,838.40
  6. Step 6: Final answer
    x = 193,115,381.03

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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.