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Finding the Fourth Proportional to 86,409.60, 129,614.40 and 79,022.40

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Solution

The fourth proportional to 86,409.60, 129,614.40 and 79,022.40 is: 118,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,409.60 : 129,614.40 = 79,022.40 : x
  2. Step 2: Convert to fraction form
    86,409.60/129,614.40 = 79,022.40/x
  3. Step 3: Cross multiply
    86,409.60x = 129,614.40 × 79,022.40
  4. Step 4: Simplify right side
    86,409.60x = 10,242,440,962.56
  5. Step 5: Solve for x
    x = 10,242,440,962.56/86,409.60
  6. Step 6: Final answer
    x = 118,533.60

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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.