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Finding the Fourth Proportional to 86,522.40, 129,783.60 and 53,134.20

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Solution

The fourth proportional to 86,522.40, 129,783.60 and 53,134.20 is: 79,701.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,522.40 : 129,783.60 = 53,134.20 : x
  2. Step 2: Convert to fraction form
    86,522.40/129,783.60 = 53,134.20/x
  3. Step 3: Cross multiply
    86,522.40x = 129,783.60 × 53,134.20
  4. Step 4: Simplify right side
    86,522.40x = 6,895,947,759.12
  5. Step 5: Solve for x
    x = 6,895,947,759.12/86,522.40
  6. Step 6: Final answer
    x = 79,701.30

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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.