Home / 128,258.91-176,997.02-71,670.29

Finding the Fourth Proportional to 128,258.91, 176,997.02 and 71,670.29

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Solution

The fourth proportional to 128,258.91, 176,997.02 and 71,670.29 is: 98,904.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,258.91 : 176,997.02 = 71,670.29 : x
  2. Step 2: Convert to fraction form
    128,258.91/176,997.02 = 71,670.29/x
  3. Step 3: Cross multiply
    128,258.91x = 176,997.02 × 71,670.29
  4. Step 4: Simplify right side
    128,258.91x = 12,685,426,509.20
  5. Step 5: Solve for x
    x = 12,685,426,509.20/128,258.91
  6. Step 6: Final answer
    x = 98,904.84

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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.