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Finding the Fourth Proportional to 225,030.51, 310,539.09 and 128,240.12

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Solution

The fourth proportional to 225,030.51, 310,539.09 and 128,240.12 is: 176,969.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,030.51 : 310,539.09 = 128,240.12 : x
  2. Step 2: Convert to fraction form
    225,030.51/310,539.09 = 128,240.12/x
  3. Step 3: Cross multiply
    225,030.51x = 310,539.09 × 128,240.12
  4. Step 4: Simplify right side
    225,030.51x = 39,823,568,613.60
  5. Step 5: Solve for x
    x = 39,823,568,613.60/225,030.51
  6. Step 6: Final answer
    x = 176,969.64

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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.