Home / 100,888.32-139,219.20-58,439.28

Finding the Fourth Proportional to 100,888.32, 139,219.20 and 58,439.28

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Solution

The fourth proportional to 100,888.32, 139,219.20 and 58,439.28 is: 80,642.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,888.32 : 139,219.20 = 58,439.28 : x
  2. Step 2: Convert to fraction form
    100,888.32/139,219.20 = 58,439.28/x
  3. Step 3: Cross multiply
    100,888.32x = 139,219.20 × 58,439.28
  4. Step 4: Simplify right side
    100,888.32x = 8,135,869,810.18
  5. Step 5: Solve for x
    x = 8,135,869,810.18/100,888.32
  6. Step 6: Final answer
    x = 80,642.34

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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.