Home / 100,895.07-139,235.19-58,478.21

Finding the Fourth Proportional to 100,895.07, 139,235.19 and 58,478.21

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Solution

The fourth proportional to 100,895.07, 139,235.19 and 58,478.21 is: 80,699.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,895.07 : 139,235.19 = 58,478.21 : x
  2. Step 2: Convert to fraction form
    100,895.07/139,235.19 = 58,478.21/x
  3. Step 3: Cross multiply
    100,895.07x = 139,235.19 × 58,478.21
  4. Step 4: Simplify right side
    100,895.07x = 8,142,224,680.21
  5. Step 5: Solve for x
    x = 8,142,224,680.21/100,895.07
  6. Step 6: Final answer
    x = 80,699.93

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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.