Home / 91,398.64-126,129.08-51,111.86

Finding the Fourth Proportional to 91,398.64, 126,129.08 and 51,111.86

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Solution

The fourth proportional to 91,398.64, 126,129.08 and 51,111.86 is: 70,533.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,398.64 : 126,129.08 = 51,111.86 : x
  2. Step 2: Convert to fraction form
    91,398.64/126,129.08 = 51,111.86/x
  3. Step 3: Cross multiply
    91,398.64x = 126,129.08 × 51,111.86
  4. Step 4: Simplify right side
    91,398.64x = 6,446,691,878.89
  5. Step 5: Solve for x
    x = 6,446,691,878.89/91,398.64
  6. Step 6: Final answer
    x = 70,533.78

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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.