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Finding the Fourth Proportional to 128,051.74, 176,719.08 and 71,466.76

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Solution

The fourth proportional to 128,051.74, 176,719.08 and 71,466.76 is: 98,628.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051.74 : 176,719.08 = 71,466.76 : x
  2. Step 2: Convert to fraction form
    128,051.74/176,719.08 = 71,466.76/x
  3. Step 3: Cross multiply
    128,051.74x = 176,719.08 × 71,466.76
  4. Step 4: Simplify right side
    128,051.74x = 12,629,540,077.78
  5. Step 5: Solve for x
    x = 12,629,540,077.78/128,051.74
  6. Step 6: Final answer
    x = 98,628.41

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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.