Home / 100,840.04-139,153.84-55,509.20

Finding the Fourth Proportional to 100,840.04, 139,153.84 and 55,509.20

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Solution

The fourth proportional to 100,840.04, 139,153.84 and 55,509.20 is: 76,599.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,840.04 : 139,153.84 = 55,509.20 : x
  2. Step 2: Convert to fraction form
    100,840.04/139,153.84 = 55,509.20/x
  3. Step 3: Cross multiply
    100,840.04x = 139,153.84 × 55,509.20
  4. Step 4: Simplify right side
    100,840.04x = 7,724,318,335.33
  5. Step 5: Solve for x
    x = 7,724,318,335.33/100,840.04
  6. Step 6: Final answer
    x = 76,599.72

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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.