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Finding the Fourth Proportional to 128,014.28, 176,631.42 and 74,268.16

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Solution

The fourth proportional to 128,014.28, 176,631.42 and 74,268.16 is: 102,473.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,014.28 : 176,631.42 = 74,268.16 : x
  2. Step 2: Convert to fraction form
    128,014.28/176,631.42 = 74,268.16/x
  3. Step 3: Cross multiply
    128,014.28x = 176,631.42 × 74,268.16
  4. Step 4: Simplify right side
    128,014.28x = 13,118,090,561.59
  5. Step 5: Solve for x
    x = 13,118,090,561.59/128,014.28
  6. Step 6: Final answer
    x = 102,473.65

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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.