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Finding the Fourth Proportional to 128,258.66, 176,996.58 and 71,670.08

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Solution

The fourth proportional to 128,258.66, 176,996.58 and 71,670.08 is: 98,904.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,258.66 : 176,996.58 = 71,670.08 : x
  2. Step 2: Convert to fraction form
    128,258.66/176,996.58 = 71,670.08/x
  3. Step 3: Cross multiply
    128,258.66x = 176,996.58 × 71,670.08
  4. Step 4: Simplify right side
    128,258.66x = 12,685,359,048.33
  5. Step 5: Solve for x
    x = 12,685,359,048.33/128,258.66
  6. Step 6: Final answer
    x = 98,904.50

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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.