Home / 155,378.25-214,428.39-87,398.40

Finding the Fourth Proportional to 155,378.25, 214,428.39 and 87,398.40

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Solution

The fourth proportional to 155,378.25, 214,428.39 and 87,398.40 is: 120,613.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,378.25 : 214,428.39 = 87,398.40 : x
  2. Step 2: Convert to fraction form
    155,378.25/214,428.39 = 87,398.40/x
  3. Step 3: Cross multiply
    155,378.25x = 214,428.39 × 87,398.40
  4. Step 4: Simplify right side
    155,378.25x = 18,740,698,200.58
  5. Step 5: Solve for x
    x = 18,740,698,200.58/155,378.25
  6. Step 6: Final answer
    x = 120,613.39

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1.5x scale

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.