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Finding the Fourth Proportional to 76,335.96, 105,339.92 and 42,345.80

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Solution

The fourth proportional to 76,335.96, 105,339.92 and 42,345.80 is: 58,435.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,335.96 : 105,339.92 = 42,345.80 : x
  2. Step 2: Convert to fraction form
    76,335.96/105,339.92 = 42,345.80/x
  3. Step 3: Cross multiply
    76,335.96x = 105,339.92 × 42,345.80
  4. Step 4: Simplify right side
    76,335.96x = 4,460,703,184.34
  5. Step 5: Solve for x
    x = 4,460,703,184.34/76,335.96
  6. Step 6: Final answer
    x = 58,435.15

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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.