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Finding the Fourth Proportional to 357,136.61, 535,699.00 and 143,899.31

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Solution

The fourth proportional to 357,136.61, 535,699.00 and 143,899.31 is: 215,846.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,136.61 : 535,699.00 = 143,899.31 : x
  2. Step 2: Convert to fraction form
    357,136.61/535,699.00 = 143,899.31/x
  3. Step 3: Cross multiply
    357,136.61x = 535,699.00 × 143,899.31
  4. Step 4: Simplify right side
    357,136.61x = 77,086,715,748.19
  5. Step 5: Solve for x
    x = 77,086,715,748.19/357,136.61
  6. Step 6: Final answer
    x = 215,846.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.