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Finding the Fourth Proportional to 99,603.80, 149,405.70 and 89,762.30

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Solution

The fourth proportional to 99,603.80, 149,405.70 and 89,762.30 is: 134,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,603.80 : 149,405.70 = 89,762.30 : x
  2. Step 2: Convert to fraction form
    99,603.80/149,405.70 = 89,762.30/x
  3. Step 3: Cross multiply
    99,603.80x = 149,405.70 × 89,762.30
  4. Step 4: Simplify right side
    99,603.80x = 13,410,999,265.11
  5. Step 5: Solve for x
    x = 13,410,999,265.11/99,603.80
  6. Step 6: Final answer
    x = 134,643.45

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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.