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Finding the Fourth Proportional to 76,798.86, 105,894.63 and 62,419.34

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Solution

The fourth proportional to 76,798.86, 105,894.63 and 62,419.34 is: 86,067.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,798.86 : 105,894.63 = 62,419.34 : x
  2. Step 2: Convert to fraction form
    76,798.86/105,894.63 = 62,419.34/x
  3. Step 3: Cross multiply
    76,798.86x = 105,894.63 × 62,419.34
  4. Step 4: Simplify right side
    76,798.86x = 6,609,872,384.67
  5. Step 5: Solve for x
    x = 6,609,872,384.67/76,798.86
  6. Step 6: Final answer
    x = 86,067.32

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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.