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Finding the Fourth Proportional to 97,230.40, 145,903.20 and 70,868.80

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Solution

The fourth proportional to 97,230.40, 145,903.20 and 70,868.80 is: 106,345.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,230.40 : 145,903.20 = 70,868.80 : x
  2. Step 2: Convert to fraction form
    97,230.40/145,903.20 = 70,868.80/x
  3. Step 3: Cross multiply
    97,230.40x = 145,903.20 × 70,868.80
  4. Step 4: Simplify right side
    97,230.40x = 10,339,984,700.16
  5. Step 5: Solve for x
    x = 10,339,984,700.16/97,230.40
  6. Step 6: Final answer
    x = 106,345.18

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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.