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Finding the Fourth Proportional to 100,699.96, 138,960.60 and 58,259.20

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Solution

The fourth proportional to 100,699.96, 138,960.60 and 58,259.20 is: 80,394.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,699.96 : 138,960.60 = 58,259.20 : x
  2. Step 2: Convert to fraction form
    100,699.96/138,960.60 = 58,259.20/x
  3. Step 3: Cross multiply
    100,699.96x = 138,960.60 × 58,259.20
  4. Step 4: Simplify right side
    100,699.96x = 8,095,733,387.52
  5. Step 5: Solve for x
    x = 8,095,733,387.52/100,699.96
  6. Step 6: Final answer
    x = 80,394.60

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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.