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Finding the Fourth Proportional to 76,203.55, 105,150.49 and 42,203.65

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Solution

The fourth proportional to 76,203.55, 105,150.49 and 42,203.65 is: 58,235.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,203.55 : 105,150.49 = 42,203.65 : x
  2. Step 2: Convert to fraction form
    76,203.55/105,150.49 = 42,203.65/x
  3. Step 3: Cross multiply
    76,203.55x = 105,150.49 × 42,203.65
  4. Step 4: Simplify right side
    76,203.55x = 4,437,733,740.52
  5. Step 5: Solve for x
    x = 4,437,733,740.52/76,203.55
  6. Step 6: Final answer
    x = 58,235.26

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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.