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Finding the Fourth Proportional to 86,313.44, 129,468.48 and 38,902.40

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Solution

The fourth proportional to 86,313.44, 129,468.48 and 38,902.40 is: 58,352.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,313.44 : 129,468.48 = 38,902.40 : x
  2. Step 2: Convert to fraction form
    86,313.44/129,468.48 = 38,902.40/x
  3. Step 3: Cross multiply
    86,313.44x = 129,468.48 × 38,902.40
  4. Step 4: Simplify right side
    86,313.44x = 5,036,634,596.35
  5. Step 5: Solve for x
    x = 5,036,634,596.35/86,313.44
  6. Step 6: Final answer
    x = 58,352.84

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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.