Home / 210,903.12-291,039.24-115,403.40

Finding the Fourth Proportional to 210,903.12, 291,039.24 and 115,403.40

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Solution

The fourth proportional to 210,903.12, 291,039.24 and 115,403.40 is: 159,252.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,903.12 : 291,039.24 = 115,403.40 : x
  2. Step 2: Convert to fraction form
    210,903.12/291,039.24 = 115,403.40/x
  3. Step 3: Cross multiply
    210,903.12x = 291,039.24 × 115,403.40
  4. Step 4: Simplify right side
    210,903.12x = 33,586,917,829.42
  5. Step 5: Solve for x
    x = 33,586,917,829.42/210,903.12
  6. Step 6: Final answer
    x = 159,252.83

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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.