Home / 155,409.84-214,465.25-87,426.86

Finding the Fourth Proportional to 155,409.84, 214,465.25 and 87,426.86

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Solution

The fourth proportional to 155,409.84, 214,465.25 and 87,426.86 is: 120,648.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,409.84 : 214,465.25 = 87,426.86 : x
  2. Step 2: Convert to fraction form
    155,409.84/214,465.25 = 87,426.86/x
  3. Step 3: Cross multiply
    155,409.84x = 214,465.25 × 87,426.86
  4. Step 4: Simplify right side
    155,409.84x = 18,750,021,877.15
  5. Step 5: Solve for x
    x = 18,750,021,877.15/155,409.84
  6. Step 6: Final answer
    x = 120,648.87

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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.