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Finding the Fourth Proportional to 210,953.55, 291,115.90 and 115,460.25

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Solution

The fourth proportional to 210,953.55, 291,115.90 and 115,460.25 is: 159,335.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,953.55 : 291,115.90 = 115,460.25 : x
  2. Step 2: Convert to fraction form
    210,953.55/291,115.90 = 115,460.25/x
  3. Step 3: Cross multiply
    210,953.55x = 291,115.90 × 115,460.25
  4. Step 4: Simplify right side
    210,953.55x = 33,612,313,501.29
  5. Step 5: Solve for x
    x = 33,612,313,501.29/210,953.55
  6. Step 6: Final answer
    x = 159,335.14

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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.