Home / 128,867.72-193,069.88-121,271.16

Finding the Fourth Proportional to 128,867.72, 193,069.88 and 121,271.16

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Solution

The fourth proportional to 128,867.72, 193,069.88 and 121,271.16 is: 181,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,867.72 : 193,069.88 = 121,271.16 : x
  2. Step 2: Convert to fraction form
    128,867.72/193,069.88 = 121,271.16/x
  3. Step 3: Cross multiply
    128,867.72x = 193,069.88 × 121,271.16
  4. Step 4: Simplify right side
    128,867.72x = 23,413,808,308.66
  5. Step 5: Solve for x
    x = 23,413,808,308.66/128,867.72
  6. Step 6: Final answer
    x = 181,688.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.