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Finding the Fourth Proportional to 297,061.76, 445,548.80 and 86,643.20

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Solution

The fourth proportional to 297,061.76, 445,548.80 and 86,643.20 is: 129,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,061.76 : 445,548.80 = 86,643.20 : x
  2. Step 2: Convert to fraction form
    297,061.76/445,548.80 = 86,643.20/x
  3. Step 3: Cross multiply
    297,061.76x = 445,548.80 × 86,643.20
  4. Step 4: Simplify right side
    297,061.76x = 38,603,773,788.16
  5. Step 5: Solve for x
    x = 38,603,773,788.16/297,061.76
  6. Step 6: Final answer
    x = 129,952.01

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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.