Home / 210,666.05-290,719.13-115,172.72

Finding the Fourth Proportional to 210,666.05, 290,719.13 and 115,172.72

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Solution

The fourth proportional to 210,666.05, 290,719.13 and 115,172.72 is: 158,938.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,666.05 : 290,719.13 = 115,172.72 : x
  2. Step 2: Convert to fraction form
    210,666.05/290,719.13 = 115,172.72/x
  3. Step 3: Cross multiply
    210,666.05x = 290,719.13 × 115,172.72
  4. Step 4: Simplify right side
    210,666.05x = 33,482,912,018.87
  5. Step 5: Solve for x
    x = 33,482,912,018.87/210,666.05
  6. Step 6: Final answer
    x = 158,938.34

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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.