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Finding the Fourth Proportional to 210,389.55, 290,339.89 and 114,899.06

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Solution

The fourth proportional to 210,389.55, 290,339.89 and 114,899.06 is: 158,561.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,389.55 : 290,339.89 = 114,899.06 : x
  2. Step 2: Convert to fraction form
    210,389.55/290,339.89 = 114,899.06/x
  3. Step 3: Cross multiply
    210,389.55x = 290,339.89 × 114,899.06
  4. Step 4: Simplify right side
    210,389.55x = 33,359,778,989.80
  5. Step 5: Solve for x
    x = 33,359,778,989.80/210,389.55
  6. Step 6: Final answer
    x = 158,561.96

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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.