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Finding the Fourth Proportional to 91,892.80, 126,808.80 and 56,142.64

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Solution

The fourth proportional to 91,892.80, 126,808.80 and 56,142.64 is: 77,474.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,892.80 : 126,808.80 = 56,142.64 : x
  2. Step 2: Convert to fraction form
    91,892.80/126,808.80 = 56,142.64/x
  3. Step 3: Cross multiply
    91,892.80x = 126,808.80 × 56,142.64
  4. Step 4: Simplify right side
    91,892.80x = 7,119,380,807.23
  5. Step 5: Solve for x
    x = 7,119,380,807.23/91,892.80
  6. Step 6: Final answer
    x = 77,474.85

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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.