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Finding the Fourth Proportional to 130,406.40, 179,980.80 and 80,140.80

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Solution

The fourth proportional to 130,406.40, 179,980.80 and 80,140.80 is: 110,606.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,406.40 : 179,980.80 = 80,140.80 : x
  2. Step 2: Convert to fraction form
    130,406.40/179,980.80 = 80,140.80/x
  3. Step 3: Cross multiply
    130,406.40x = 179,980.80 × 80,140.80
  4. Step 4: Simplify right side
    130,406.40x = 14,423,805,296.64
  5. Step 5: Solve for x
    x = 14,423,805,296.64/130,406.40
  6. Step 6: Final answer
    x = 110,606.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.