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Finding the Fourth Proportional to 145,405.92, 218,172.60 and 70,583.52

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Solution

The fourth proportional to 145,405.92, 218,172.60 and 70,583.52 is: 105,906.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,405.92 : 218,172.60 = 70,583.52 : x
  2. Step 2: Convert to fraction form
    145,405.92/218,172.60 = 70,583.52/x
  3. Step 3: Cross multiply
    145,405.92x = 218,172.60 × 70,583.52
  4. Step 4: Simplify right side
    145,405.92x = 15,399,390,075.55
  5. Step 5: Solve for x
    x = 15,399,390,075.55/145,405.92
  6. Step 6: Final answer
    x = 105,906.21

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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.