Home / 137,612.04-189,728.80-89,128.32

Finding the Fourth Proportional to 137,612.04, 189,728.80 and 89,128.32

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Solution

The fourth proportional to 137,612.04, 189,728.80 and 89,128.32 is: 122,883.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,612.04 : 189,728.80 = 89,128.32 : x
  2. Step 2: Convert to fraction form
    137,612.04/189,728.80 = 89,128.32/x
  3. Step 3: Cross multiply
    137,612.04x = 189,728.80 × 89,128.32
  4. Step 4: Simplify right side
    137,612.04x = 16,910,209,199.62
  5. Step 5: Solve for x
    x = 16,910,209,199.62/137,612.04
  6. Step 6: Final answer
    x = 122,883.21

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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.