Home / 155,904.07-215,153.90-86,999.56

Finding the Fourth Proportional to 155,904.07, 215,153.90 and 86,999.56

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Solution

The fourth proportional to 155,904.07, 215,153.90 and 86,999.56 is: 120,062.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,904.07 : 215,153.90 = 86,999.56 : x
  2. Step 2: Convert to fraction form
    155,904.07/215,153.90 = 86,999.56/x
  3. Step 3: Cross multiply
    155,904.07x = 215,153.90 × 86,999.56
  4. Step 4: Simplify right side
    155,904.07x = 18,718,294,792.48
  5. Step 5: Solve for x
    x = 18,718,294,792.48/155,904.07
  6. Step 6: Final answer
    x = 120,062.90

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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.