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Finding the Fourth Proportional to 100,798.20, 139,092.48 and 58,359.60

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Solution

The fourth proportional to 100,798.20, 139,092.48 and 58,359.60 is: 80,531.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,798.20 : 139,092.48 = 58,359.60 : x
  2. Step 2: Convert to fraction form
    100,798.20/139,092.48 = 58,359.60/x
  3. Step 3: Cross multiply
    100,798.20x = 139,092.48 × 58,359.60
  4. Step 4: Simplify right side
    100,798.20x = 8,117,381,495.81
  5. Step 5: Solve for x
    x = 8,117,381,495.81/100,798.20
  6. Step 6: Final answer
    x = 80,531.02

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1.5x scale

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.