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Finding the Fourth Proportional to 210,553.80, 290,563.65 and 115,061.10

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Solution

The fourth proportional to 210,553.80, 290,563.65 and 115,061.10 is: 158,783.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,553.80 : 290,563.65 = 115,061.10 : x
  2. Step 2: Convert to fraction form
    210,553.80/290,563.65 = 115,061.10/x
  3. Step 3: Cross multiply
    210,553.80x = 290,563.65 × 115,061.10
  4. Step 4: Simplify right side
    210,553.80x = 33,432,573,189.02
  5. Step 5: Solve for x
    x = 33,432,573,189.02/210,553.80
  6. Step 6: Final answer
    x = 158,783.99

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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.