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Finding the Fourth Proportional to 86,912.16, 130,368.24 and 45,349.44

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Solution

The fourth proportional to 86,912.16, 130,368.24 and 45,349.44 is: 68,024.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912.16 : 130,368.24 = 45,349.44 : x
  2. Step 2: Convert to fraction form
    86,912.16/130,368.24 = 45,349.44/x
  3. Step 3: Cross multiply
    86,912.16x = 130,368.24 × 45,349.44
  4. Step 4: Simplify right side
    86,912.16x = 5,912,126,677.79
  5. Step 5: Solve for x
    x = 5,912,126,677.79/86,912.16
  6. Step 6: Final answer
    x = 68,024.16

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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.