Home / 210,055.72-289,825.14-128,363.08

Finding the Fourth Proportional to 210,055.72, 289,825.14 and 128,363.08

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Solution

The fourth proportional to 210,055.72, 289,825.14 and 128,363.08 is: 177,109.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,055.72 : 289,825.14 = 128,363.08 : x
  2. Step 2: Convert to fraction form
    210,055.72/289,825.14 = 128,363.08/x
  3. Step 3: Cross multiply
    210,055.72x = 289,825.14 × 128,363.08
  4. Step 4: Simplify right side
    210,055.72x = 37,202,847,631.83
  5. Step 5: Solve for x
    x = 37,202,847,631.83/210,055.72
  6. Step 6: Final answer
    x = 177,109.42

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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.