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Finding the Fourth Proportional to 86,728.96, 119,705.96 and 56,461.56

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Solution

The fourth proportional to 86,728.96, 119,705.96 and 56,461.56 is: 77,929.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,728.96 : 119,705.96 = 56,461.56 : x
  2. Step 2: Convert to fraction form
    86,728.96/119,705.96 = 56,461.56/x
  3. Step 3: Cross multiply
    86,728.96x = 119,705.96 × 56,461.56
  4. Step 4: Simplify right side
    86,728.96x = 6,758,785,242.90
  5. Step 5: Solve for x
    x = 6,758,785,242.90/86,728.96
  6. Step 6: Final answer
    x = 77,929.97

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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.