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Finding the Fourth Proportional to 100,798.17, 139,101.35 and 62,543.49

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Solution

The fourth proportional to 100,798.17, 139,101.35 and 62,543.49 is: 86,309.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,798.17 : 139,101.35 = 62,543.49 : x
  2. Step 2: Convert to fraction form
    100,798.17/139,101.35 = 62,543.49/x
  3. Step 3: Cross multiply
    100,798.17x = 139,101.35 × 62,543.49
  4. Step 4: Simplify right side
    100,798.17x = 8,699,883,579.99
  5. Step 5: Solve for x
    x = 8,699,883,579.99/100,798.17
  6. Step 6: Final answer
    x = 86,309.94

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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.