Home / 328,531.84-492,851.02-128,743.90

Finding the Fourth Proportional to 328,531.84, 492,851.02 and 128,743.90

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Solution

The fourth proportional to 328,531.84, 492,851.02 and 128,743.90 is: 193,136.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,531.84 : 492,851.02 = 128,743.90 : x
  2. Step 2: Convert to fraction form
    328,531.84/492,851.02 = 128,743.90/x
  3. Step 3: Cross multiply
    328,531.84x = 492,851.02 × 128,743.90
  4. Step 4: Simplify right side
    328,531.84x = 63,451,562,433.78
  5. Step 5: Solve for x
    x = 63,451,562,433.78/328,531.84
  6. Step 6: Final answer
    x = 193,136.72

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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.