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Finding the Fourth Proportional to 86,238,210.60, 129,357,315.90 and 86,238,210.60

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Solution

The fourth proportional to 86,238,210.60, 129,357,315.90 and 86,238,210.60 is: 129,357,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,238,210.60 : 129,357,315.90 = 86,238,210.60 : x
  2. Step 2: Convert to fraction form
    86,238,210.60/129,357,315.90 = 86,238,210.60/x
  3. Step 3: Cross multiply
    86,238,210.60x = 129,357,315.90 × 86,238,210.60
  4. Step 4: Simplify right side
    86,238,210.60x = 11,155,543,451,234,928
  5. Step 5: Solve for x
    x = 11,155,543,451,234,928/86,238,210.60
  6. Step 6: Final answer
    x = 129,357,315.90

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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.