Home / 129,027.12-178,054.80-72,438.48

Finding the Fourth Proportional to 129,027.12, 178,054.80 and 72,438.48

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Solution

The fourth proportional to 129,027.12, 178,054.80 and 72,438.48 is: 99,963.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,027.12 : 178,054.80 = 72,438.48 : x
  2. Step 2: Convert to fraction form
    129,027.12/178,054.80 = 72,438.48/x
  3. Step 3: Cross multiply
    129,027.12x = 178,054.80 × 72,438.48
  4. Step 4: Simplify right side
    129,027.12x = 12,898,019,068.70
  5. Step 5: Solve for x
    x = 12,898,019,068.70/129,027.12
  6. Step 6: Final answer
    x = 99,963.63

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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.