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Finding the Fourth Proportional to 296,968.80, 445,555.20 and 86,637.60

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Solution

The fourth proportional to 296,968.80, 445,555.20 and 86,637.60 is: 129,986.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,968.80 : 445,555.20 = 86,637.60 : x
  2. Step 2: Convert to fraction form
    296,968.80/445,555.20 = 86,637.60/x
  3. Step 3: Cross multiply
    296,968.80x = 445,555.20 × 86,637.60
  4. Step 4: Simplify right side
    296,968.80x = 38,601,833,195.52
  5. Step 5: Solve for x
    x = 38,601,833,195.52/296,968.80
  6. Step 6: Final answer
    x = 129,986.16

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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.