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Finding the Fourth Proportional to 76,486.96, 105,540.60 and 42,946.48

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Solution

The fourth proportional to 76,486.96, 105,540.60 and 42,946.48 is: 59,259.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,486.96 : 105,540.60 = 42,946.48 : x
  2. Step 2: Convert to fraction form
    76,486.96/105,540.60 = 42,946.48/x
  3. Step 3: Cross multiply
    76,486.96x = 105,540.60 × 42,946.48
  4. Step 4: Simplify right side
    76,486.96x = 4,532,597,267.09
  5. Step 5: Solve for x
    x = 4,532,597,267.09/76,486.96
  6. Step 6: Final answer
    x = 59,259.74

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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.