Home / 155,639.80-214,743.90-87,643

Finding the Fourth Proportional to 155,639.80, 214,743.90 and 87,643

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Solution

The fourth proportional to 155,639.80, 214,743.90 and 87,643 is: 120,925.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,639.80 : 214,743.90 = 87,643 : x
  2. Step 2: Convert to fraction form
    155,639.80/214,743.90 = 87,643/x
  3. Step 3: Cross multiply
    155,639.80x = 214,743.90 × 87,643
  4. Step 4: Simplify right side
    155,639.80x = 18,820,799,627.70
  5. Step 5: Solve for x
    x = 18,820,799,627.70/155,639.80
  6. Step 6: Final answer
    x = 120,925.37

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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.