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Finding the Fourth Proportional to 100,971.36, 139,340.64 and 58,554.72

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Solution

The fourth proportional to 100,971.36, 139,340.64 and 58,554.72 is: 80,805.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,971.36 : 139,340.64 = 58,554.72 : x
  2. Step 2: Convert to fraction form
    100,971.36/139,340.64 = 58,554.72/x
  3. Step 3: Cross multiply
    100,971.36x = 139,340.64 × 58,554.72
  4. Step 4: Simplify right side
    100,971.36x = 8,159,052,159.82
  5. Step 5: Solve for x
    x = 8,159,052,159.82/100,971.36
  6. Step 6: Final answer
    x = 80,805.61

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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.