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Finding the Fourth Proportional to 78,412.30, 117,424.05 and 62,860.30

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Solution

The fourth proportional to 78,412.30, 117,424.05 and 62,860.30 is: 94,134.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,412.30 : 117,424.05 = 62,860.30 : x
  2. Step 2: Convert to fraction form
    78,412.30/117,424.05 = 62,860.30/x
  3. Step 3: Cross multiply
    78,412.30x = 117,424.05 × 62,860.30
  4. Step 4: Simplify right side
    78,412.30x = 7,381,311,010.22
  5. Step 5: Solve for x
    x = 7,381,311,010.22/78,412.30
  6. Step 6: Final answer
    x = 94,134.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.