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Finding the Fourth Proportional to 99,525.60, 149,086.80 and 61,970.40

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Solution

The fourth proportional to 99,525.60, 149,086.80 and 61,970.40 is: 92,830.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,525.60 : 149,086.80 = 61,970.40 : x
  2. Step 2: Convert to fraction form
    99,525.60/149,086.80 = 61,970.40/x
  3. Step 3: Cross multiply
    99,525.60x = 149,086.80 × 61,970.40
  4. Step 4: Simplify right side
    99,525.60x = 9,238,968,630.72
  5. Step 5: Solve for x
    x = 9,238,968,630.72/99,525.60
  6. Step 6: Final answer
    x = 92,830.07

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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.