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Finding the Fourth Proportional to 128,009.08, 176,649.42 and 74,298.52

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Solution

The fourth proportional to 128,009.08, 176,649.42 and 74,298.52 is: 102,530.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,009.08 : 176,649.42 = 74,298.52 : x
  2. Step 2: Convert to fraction form
    128,009.08/176,649.42 = 74,298.52/x
  3. Step 3: Cross multiply
    128,009.08x = 176,649.42 × 74,298.52
  4. Step 4: Simplify right side
    128,009.08x = 13,124,790,464.86
  5. Step 5: Solve for x
    x = 13,124,790,464.86/128,009.08
  6. Step 6: Final answer
    x = 102,530.15

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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.