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Finding the Fourth Proportional to 128,012.77, 176,629.35 and 74,266.66

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Solution

The fourth proportional to 128,012.77, 176,629.35 and 74,266.66 is: 102,471.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,012.77 : 176,629.35 = 74,266.66 : x
  2. Step 2: Convert to fraction form
    128,012.77/176,629.35 = 74,266.66/x
  3. Step 3: Cross multiply
    128,012.77x = 176,629.35 × 74,266.66
  4. Step 4: Simplify right side
    128,012.77x = 13,117,671,882.47
  5. Step 5: Solve for x
    x = 13,117,671,882.47/128,012.77
  6. Step 6: Final answer
    x = 102,471.59

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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.