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Finding the Fourth Proportional to 69,872,709.60, 104,809,064.40 and 18,759,895.20

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Solution

The fourth proportional to 69,872,709.60, 104,809,064.40 and 18,759,895.20 is: 28,139,842.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,872,709.60 : 104,809,064.40 = 18,759,895.20 : x
  2. Step 2: Convert to fraction form
    69,872,709.60/104,809,064.40 = 18,759,895.20/x
  3. Step 3: Cross multiply
    69,872,709.60x = 104,809,064.40 × 18,759,895.20
  4. Step 4: Simplify right side
    69,872,709.60x = 1,966,207,064,154,051
  5. Step 5: Solve for x
    x = 1,966,207,064,154,051/69,872,709.60
  6. Step 6: Final answer
    x = 28,139,842.80

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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.