Home / 109,686.04-151,220.35-87,099.79

Finding the Fourth Proportional to 109,686.04, 151,220.35 and 87,099.79

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Solution

The fourth proportional to 109,686.04, 151,220.35 and 87,099.79 is: 120,081.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,686.04 : 151,220.35 = 87,099.79 : x
  2. Step 2: Convert to fraction form
    109,686.04/151,220.35 = 87,099.79/x
  3. Step 3: Cross multiply
    109,686.04x = 151,220.35 × 87,099.79
  4. Step 4: Simplify right side
    109,686.04x = 13,171,260,728.73
  5. Step 5: Solve for x
    x = 13,171,260,728.73/109,686.04
  6. Step 6: Final answer
    x = 120,081.47

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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.