Home / 155,820.84-215,100.54-121,287.30

Finding the Fourth Proportional to 155,820.84, 215,100.54 and 121,287.30

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Solution

The fourth proportional to 155,820.84, 215,100.54 and 121,287.30 is: 167,429.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,820.84 : 215,100.54 = 121,287.30 : x
  2. Step 2: Convert to fraction form
    155,820.84/215,100.54 = 121,287.30/x
  3. Step 3: Cross multiply
    155,820.84x = 215,100.54 × 121,287.30
  4. Step 4: Simplify right side
    155,820.84x = 26,088,963,725.14
  5. Step 5: Solve for x
    x = 26,088,963,725.14/155,820.84
  6. Step 6: Final answer
    x = 167,429.23

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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.