Home / 81,656,999.60-122,485,499.40-21,072,725.60

Finding the Fourth Proportional to 81,656,999.60, 122,485,499.40 and 21,072,725.60

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Solution

The fourth proportional to 81,656,999.60, 122,485,499.40 and 21,072,725.60 is: 31,609,088.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656,999.60 : 122,485,499.40 = 21,072,725.60 : x
  2. Step 2: Convert to fraction form
    81,656,999.60/122,485,499.40 = 21,072,725.60/x
  3. Step 3: Cross multiply
    81,656,999.60x = 122,485,499.40 × 21,072,725.60
  4. Step 4: Simplify right side
    81,656,999.60x = 2,581,103,318,835,165
  5. Step 5: Solve for x
    x = 2,581,103,318,835,165/81,656,999.60
  6. Step 6: Final answer
    x = 31,609,088.40

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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.