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Finding the Fourth Proportional to 91,967.60, 126,931.80 and 54,239.60

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Solution

The fourth proportional to 91,967.60, 126,931.80 and 54,239.60 is: 74,860.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,967.60 : 126,931.80 = 54,239.60 : x
  2. Step 2: Convert to fraction form
    91,967.60/126,931.80 = 54,239.60/x
  3. Step 3: Cross multiply
    91,967.60x = 126,931.80 × 54,239.60
  4. Step 4: Simplify right side
    91,967.60x = 6,884,730,059.28
  5. Step 5: Solve for x
    x = 6,884,730,059.28/91,967.60
  6. Step 6: Final answer
    x = 74,860.39

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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.