Home / 100,895.45-139,235.70-58,478.58

Finding the Fourth Proportional to 100,895.45, 139,235.70 and 58,478.58

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Solution

The fourth proportional to 100,895.45, 139,235.70 and 58,478.58 is: 80,700.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,895.45 : 139,235.70 = 58,478.58 : x
  2. Step 2: Convert to fraction form
    100,895.45/139,235.70 = 58,478.58/x
  3. Step 3: Cross multiply
    100,895.45x = 139,235.70 × 58,478.58
  4. Step 4: Simplify right side
    100,895.45x = 8,142,306,021.31
  5. Step 5: Solve for x
    x = 8,142,306,021.31/100,895.45
  6. Step 6: Final answer
    x = 80,700.43

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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.