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Finding the Fourth Proportional to 210,538.52, 290,543.90 and 115,045.21

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Solution

The fourth proportional to 210,538.52, 290,543.90 and 115,045.21 is: 158,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,538.52 : 290,543.90 = 115,045.21 : x
  2. Step 2: Convert to fraction form
    210,538.52/290,543.90 = 115,045.21/x
  3. Step 3: Cross multiply
    210,538.52x = 290,543.90 × 115,045.21
  4. Step 4: Simplify right side
    210,538.52x = 33,425,683,777.67
  5. Step 5: Solve for x
    x = 33,425,683,777.67/210,538.52
  6. Step 6: Final answer
    x = 158,762.80

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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.