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Finding the Fourth Proportional to 70,339,991.60, 105,509,987.40 and 64,069,425.20

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Solution

The fourth proportional to 70,339,991.60, 105,509,987.40 and 64,069,425.20 is: 96,104,137.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,339,991.60 : 105,509,987.40 = 64,069,425.20 : x
  2. Step 2: Convert to fraction form
    70,339,991.60/105,509,987.40 = 64,069,425.20/x
  3. Step 3: Cross multiply
    70,339,991.60x = 105,509,987.40 × 64,069,425.20
  4. Step 4: Simplify right side
    70,339,991.60x = 6,759,964,245,577,243
  5. Step 5: Solve for x
    x = 6,759,964,245,577,243/70,339,991.60
  6. Step 6: Final answer
    x = 96,104,137.80

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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.