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Finding the Fourth Proportional to 130,579,281.60, 195,700,960.80 and 79,406,980.80

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Solution

The fourth proportional to 130,579,281.60, 195,700,960.80 and 79,406,980.80 is: 119,008,331.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,579,281.60 : 195,700,960.80 = 79,406,980.80 : x
  2. Step 2: Convert to fraction form
    130,579,281.60/195,700,960.80 = 79,406,980.80/x
  3. Step 3: Cross multiply
    130,579,281.60x = 195,700,960.80 × 79,406,980.80
  4. Step 4: Simplify right side
    130,579,281.60x = 15,540,022,436,787,154
  5. Step 5: Solve for x
    x = 15,540,022,436,787,154/130,579,281.60
  6. Step 6: Final answer
    x = 119,008,331.54

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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.