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Finding the Fourth Proportional to 559,695.67, 839,543.28 and 138,971.55

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Solution

The fourth proportional to 559,695.67, 839,543.28 and 138,971.55 is: 208,457.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,695.67 : 839,543.28 = 138,971.55 : x
  2. Step 2: Convert to fraction form
    559,695.67/839,543.28 = 138,971.55/x
  3. Step 3: Cross multiply
    559,695.67x = 839,543.28 × 138,971.55
  4. Step 4: Simplify right side
    559,695.67x = 116,672,629,600.11
  5. Step 5: Solve for x
    x = 116,672,629,600.11/559,695.67
  6. Step 6: Final answer
    x = 208,457.27

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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.