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Finding the Fourth Proportional to 258,692,723.70, 388,039,085.55 and 129,320,301.30

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Solution

The fourth proportional to 258,692,723.70, 388,039,085.55 and 129,320,301.30 is: 193,980,451.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,692,723.70 : 388,039,085.55 = 129,320,301.30 : x
  2. Step 2: Convert to fraction form
    258,692,723.70/388,039,085.55 = 129,320,301.30/x
  3. Step 3: Cross multiply
    258,692,723.70x = 388,039,085.55 × 129,320,301.30
  4. Step 4: Simplify right side
    258,692,723.70x = 50,181,331,459,502,480
  5. Step 5: Solve for x
    x = 50,181,331,459,502,480/258,692,723.70
  6. Step 6: Final answer
    x = 193,980,451.95

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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.