Home / 86,019,549.20-129,029,323.80-43,021,379.60

Finding the Fourth Proportional to 86,019,549.20, 129,029,323.80 and 43,021,379.60

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Solution

The fourth proportional to 86,019,549.20, 129,029,323.80 and 43,021,379.60 is: 64,532,069.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,019,549.20 : 129,029,323.80 = 43,021,379.60 : x
  2. Step 2: Convert to fraction form
    86,019,549.20/129,029,323.80 = 43,021,379.60/x
  3. Step 3: Cross multiply
    86,019,549.20x = 129,029,323.80 × 43,021,379.60
  4. Step 4: Simplify right side
    86,019,549.20x = 5,551,019,518,731,115
  5. Step 5: Solve for x
    x = 5,551,019,518,731,115/86,019,549.20
  6. Step 6: Final answer
    x = 64,532,069.40

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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.