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Finding the Fourth Proportional to 339,090.72, 508,643.64 and 86,370.18

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Solution

The fourth proportional to 339,090.72, 508,643.64 and 86,370.18 is: 129,557.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,090.72 : 508,643.64 = 86,370.18 : x
  2. Step 2: Convert to fraction form
    339,090.72/508,643.64 = 86,370.18/x
  3. Step 3: Cross multiply
    339,090.72x = 508,643.64 × 86,370.18
  4. Step 4: Simplify right side
    339,090.72x = 43,931,642,742.66
  5. Step 5: Solve for x
    x = 43,931,642,742.66/339,090.72
  6. Step 6: Final answer
    x = 129,557.20

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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.