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Finding the Fourth Proportional to 91,606.88, 126,388.80 and 51,315.20

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Solution

The fourth proportional to 91,606.88, 126,388.80 and 51,315.20 is: 70,798.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,606.88 : 126,388.80 = 51,315.20 : x
  2. Step 2: Convert to fraction form
    91,606.88/126,388.80 = 51,315.20/x
  3. Step 3: Cross multiply
    91,606.88x = 126,388.80 × 51,315.20
  4. Step 4: Simplify right side
    91,606.88x = 6,485,666,549.76
  5. Step 5: Solve for x
    x = 6,485,666,549.76/91,606.88
  6. Step 6: Final answer
    x = 70,798.90

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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.