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Finding the Fourth Proportional to 91,903.80, 126,823.98 and 56,153.64

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Solution

The fourth proportional to 91,903.80, 126,823.98 and 56,153.64 is: 77,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,903.80 : 126,823.98 = 56,153.64 : x
  2. Step 2: Convert to fraction form
    91,903.80/126,823.98 = 56,153.64/x
  3. Step 3: Cross multiply
    91,903.80x = 126,823.98 × 56,153.64
  4. Step 4: Simplify right side
    91,903.80x = 7,121,628,116.29
  5. Step 5: Solve for x
    x = 7,121,628,116.29/91,903.80
  6. Step 6: Final answer
    x = 77,490.03

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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.