Home / 76,385.05-105,409.80-42,393.28

Finding the Fourth Proportional to 76,385.05, 105,409.80 and 42,393.28

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Solution

The fourth proportional to 76,385.05, 105,409.80 and 42,393.28 is: 58,501.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,385.05 : 105,409.80 = 42,393.28 : x
  2. Step 2: Convert to fraction form
    76,385.05/105,409.80 = 42,393.28/x
  3. Step 3: Cross multiply
    76,385.05x = 105,409.80 × 42,393.28
  4. Step 4: Simplify right side
    76,385.05x = 4,468,667,166.14
  5. Step 5: Solve for x
    x = 4,468,667,166.14/76,385.05
  6. Step 6: Final answer
    x = 58,501.86

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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.