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Finding the Fourth Proportional to 130,576, 179,021.35 and 128,214.04

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Solution

The fourth proportional to 130,576, 179,021.35 and 128,214.04 is: 175,783.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,576 : 179,021.35 = 128,214.04 : x
  2. Step 2: Convert to fraction form
    130,576/179,021.35 = 128,214.04/x
  3. Step 3: Cross multiply
    130,576x = 179,021.35 × 128,214.04
  4. Step 4: Simplify right side
    130,576x = 22,953,049,888.68
  5. Step 5: Solve for x
    x = 22,953,049,888.68/130,576
  6. Step 6: Final answer
    x = 175,783.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.