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Finding the Fourth Proportional to 76,008.24, 104,890.80 and 42,019.20

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Solution

The fourth proportional to 76,008.24, 104,890.80 and 42,019.20 is: 57,986.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,008.24 : 104,890.80 = 42,019.20 : x
  2. Step 2: Convert to fraction form
    76,008.24/104,890.80 = 42,019.20/x
  3. Step 3: Cross multiply
    76,008.24x = 104,890.80 × 42,019.20
  4. Step 4: Simplify right side
    76,008.24x = 4,407,427,503.36
  5. Step 5: Solve for x
    x = 4,407,427,503.36/76,008.24
  6. Step 6: Final answer
    x = 57,986.18

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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.