Home / 76,398.76-105,429.92-42,407.66

Finding the Fourth Proportional to 76,398.76, 105,429.92 and 42,407.66

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Solution

The fourth proportional to 76,398.76, 105,429.92 and 42,407.66 is: 58,522.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,398.76 : 105,429.92 = 42,407.66 : x
  2. Step 2: Convert to fraction form
    76,398.76/105,429.92 = 42,407.66/x
  3. Step 3: Cross multiply
    76,398.76x = 105,429.92 × 42,407.66
  4. Step 4: Simplify right side
    76,398.76x = 4,471,036,201.19
  5. Step 5: Solve for x
    x = 4,471,036,201.19/76,398.76
  6. Step 6: Final answer
    x = 58,522.37

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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.