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Finding the Fourth Proportional to 76,295.32, 105,290.90 and 42,301.64

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Solution

The fourth proportional to 76,295.32, 105,290.90 and 42,301.64 is: 58,378.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,295.32 : 105,290.90 = 42,301.64 : x
  2. Step 2: Convert to fraction form
    76,295.32/105,290.90 = 42,301.64/x
  3. Step 3: Cross multiply
    76,295.32x = 105,290.90 × 42,301.64
  4. Step 4: Simplify right side
    76,295.32x = 4,453,977,747.08
  5. Step 5: Solve for x
    x = 4,453,977,747.08/76,295.32
  6. Step 6: Final answer
    x = 58,378.13

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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.