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Finding the Fourth Proportional to 74,889,987.20, 112,334,980.80 and 61,900,956.80

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Solution

The fourth proportional to 74,889,987.20, 112,334,980.80 and 61,900,956.80 is: 92,851,435.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,889,987.20 : 112,334,980.80 = 61,900,956.80 : x
  2. Step 2: Convert to fraction form
    74,889,987.20/112,334,980.80 = 61,900,956.80/x
  3. Step 3: Cross multiply
    74,889,987.20x = 112,334,980.80 × 61,900,956.80
  4. Step 4: Simplify right side
    74,889,987.20x = 6,953,642,793,629,629
  5. Step 5: Solve for x
    x = 6,953,642,793,629,629/74,889,987.20
  6. Step 6: Final answer
    x = 92,851,435.20

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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.