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Finding the Fourth Proportional to 76,504.55, 105,574.16 and 42,512.16

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Solution

The fourth proportional to 76,504.55, 105,574.16 and 42,512.16 is: 58,665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,504.55 : 105,574.16 = 42,512.16 : x
  2. Step 2: Convert to fraction form
    76,504.55/105,574.16 = 42,512.16/x
  3. Step 3: Cross multiply
    76,504.55x = 105,574.16 × 42,512.16
  4. Step 4: Simplify right side
    76,504.55x = 4,488,185,581.79
  5. Step 5: Solve for x
    x = 4,488,185,581.79/76,504.55
  6. Step 6: Final answer
    x = 58,665.60

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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.