Home / 128,523.12-177,345.09-74,817.69

Finding the Fourth Proportional to 128,523.12, 177,345.09 and 74,817.69

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Solution

The fourth proportional to 128,523.12, 177,345.09 and 74,817.69 is: 103,238.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,523.12 : 177,345.09 = 74,817.69 : x
  2. Step 2: Convert to fraction form
    128,523.12/177,345.09 = 74,817.69/x
  3. Step 3: Cross multiply
    128,523.12x = 177,345.09 × 74,817.69
  4. Step 4: Simplify right side
    128,523.12x = 13,268,549,966.64
  5. Step 5: Solve for x
    x = 13,268,549,966.64/128,523.12
  6. Step 6: Final answer
    x = 103,238.62

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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.