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Finding the Fourth Proportional to 91,507.46, 126,242.70 and 55,691.60

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Solution

The fourth proportional to 91,507.46, 126,242.70 and 55,691.60 is: 76,831.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,507.46 : 126,242.70 = 55,691.60 : x
  2. Step 2: Convert to fraction form
    91,507.46/126,242.70 = 55,691.60/x
  3. Step 3: Cross multiply
    91,507.46x = 126,242.70 × 55,691.60
  4. Step 4: Simplify right side
    91,507.46x = 7,030,657,951.32
  5. Step 5: Solve for x
    x = 7,030,657,951.32/91,507.46
  6. Step 6: Final answer
    x = 76,831.53

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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.