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Finding the Fourth Proportional to 82,795.20, 124,192.80 and 78,712.80

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Solution

The fourth proportional to 82,795.20, 124,192.80 and 78,712.80 is: 118,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,795.20 : 124,192.80 = 78,712.80 : x
  2. Step 2: Convert to fraction form
    82,795.20/124,192.80 = 78,712.80/x
  3. Step 3: Cross multiply
    82,795.20x = 124,192.80 × 78,712.80
  4. Step 4: Simplify right side
    82,795.20x = 9,775,563,027.84
  5. Step 5: Solve for x
    x = 9,775,563,027.84/82,795.20
  6. Step 6: Final answer
    x = 118,069.20

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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.