Home / 424,128.96-636,287.40-139,808.16

Finding the Fourth Proportional to 424,128.96, 636,287.40 and 139,808.16

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Solution

The fourth proportional to 424,128.96, 636,287.40 and 139,808.16 is: 209,743.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,128.96 : 636,287.40 = 139,808.16 : x
  2. Step 2: Convert to fraction form
    424,128.96/636,287.40 = 139,808.16/x
  3. Step 3: Cross multiply
    424,128.96x = 636,287.40 × 139,808.16
  4. Step 4: Simplify right side
    424,128.96x = 88,958,170,625.18
  5. Step 5: Solve for x
    x = 88,958,170,625.18/424,128.96
  6. Step 6: Final answer
    x = 209,743.21

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1.5x scale

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.