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Finding the Fourth Proportional to 315,669.64, 473,574.42 and 91,012.54

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Solution

The fourth proportional to 315,669.64, 473,574.42 and 91,012.54 is: 136,538.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,669.64 : 473,574.42 = 91,012.54 : x
  2. Step 2: Convert to fraction form
    315,669.64/473,574.42 = 91,012.54/x
  3. Step 3: Cross multiply
    315,669.64x = 473,574.42 × 91,012.54
  4. Step 4: Simplify right side
    315,669.64x = 43,101,210,843.23
  5. Step 5: Solve for x
    x = 43,101,210,843.23/315,669.64
  6. Step 6: Final answer
    x = 136,538.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.