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Finding the Fourth Proportional to 210,490.88, 290,483.12 and 115,002.72

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Solution

The fourth proportional to 210,490.88, 290,483.12 and 115,002.72 is: 158,706.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,490.88 : 290,483.12 = 115,002.72 : x
  2. Step 2: Convert to fraction form
    210,490.88/290,483.12 = 115,002.72/x
  3. Step 3: Cross multiply
    210,490.88x = 290,483.12 × 115,002.72
  4. Step 4: Simplify right side
    210,490.88x = 33,406,348,914.09
  5. Step 5: Solve for x
    x = 33,406,348,914.09/210,490.88
  6. Step 6: Final answer
    x = 158,706.87

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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.