Home / 129,440.01-178,585.50-72,840.45

Finding the Fourth Proportional to 129,440.01, 178,585.50 and 72,840.45

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Solution

The fourth proportional to 129,440.01, 178,585.50 and 72,840.45 is: 100,496.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,440.01 : 178,585.50 = 72,840.45 : x
  2. Step 2: Convert to fraction form
    129,440.01/178,585.50 = 72,840.45/x
  3. Step 3: Cross multiply
    129,440.01x = 178,585.50 × 72,840.45
  4. Step 4: Simplify right side
    129,440.01x = 13,008,248,183.48
  5. Step 5: Solve for x
    x = 13,008,248,183.48/129,440.01
  6. Step 6: Final answer
    x = 100,496.35

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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.