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Finding the Fourth Proportional to 268,211.52, 370,121.76 and 148,987.20

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Solution

The fourth proportional to 268,211.52, 370,121.76 and 148,987.20 is: 205,596.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,211.52 : 370,121.76 = 148,987.20 : x
  2. Step 2: Convert to fraction form
    268,211.52/370,121.76 = 148,987.20/x
  3. Step 3: Cross multiply
    268,211.52x = 370,121.76 × 148,987.20
  4. Step 4: Simplify right side
    268,211.52x = 55,143,404,681.47
  5. Step 5: Solve for x
    x = 55,143,404,681.47/268,211.52
  6. Step 6: Final answer
    x = 205,596.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.