Home / 100,438.02-138,605.58-55,114.72

Finding the Fourth Proportional to 100,438.02, 138,605.58 and 55,114.72

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Solution

The fourth proportional to 100,438.02, 138,605.58 and 55,114.72 is: 76,058.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,438.02 : 138,605.58 = 55,114.72 : x
  2. Step 2: Convert to fraction form
    100,438.02/138,605.58 = 55,114.72/x
  3. Step 3: Cross multiply
    100,438.02x = 138,605.58 × 55,114.72
  4. Step 4: Simplify right side
    100,438.02x = 7,639,207,385.62
  5. Step 5: Solve for x
    x = 7,639,207,385.62/100,438.02
  6. Step 6: Final answer
    x = 76,058.92

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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.