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Finding the Fourth Proportional to 258,909.60, 388,510.20 and 101,117.55

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Solution

The fourth proportional to 258,909.60, 388,510.20 and 101,117.55 is: 151,733.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,909.60 : 388,510.20 = 101,117.55 : x
  2. Step 2: Convert to fraction form
    258,909.60/388,510.20 = 101,117.55/x
  3. Step 3: Cross multiply
    258,909.60x = 388,510.20 × 101,117.55
  4. Step 4: Simplify right side
    258,909.60x = 39,285,199,574.01
  5. Step 5: Solve for x
    x = 39,285,199,574.01/258,909.60
  6. Step 6: Final answer
    x = 151,733.27

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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.