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Finding the Fourth Proportional to 99,860.40, 149,855.40 and 57,740.40

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Solution

The fourth proportional to 99,860.40, 149,855.40 and 57,740.40 is: 86,648.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,860.40 : 149,855.40 = 57,740.40 : x
  2. Step 2: Convert to fraction form
    99,860.40/149,855.40 = 57,740.40/x
  3. Step 3: Cross multiply
    99,860.40x = 149,855.40 × 57,740.40
  4. Step 4: Simplify right side
    99,860.40x = 8,652,710,738.16
  5. Step 5: Solve for x
    x = 8,652,710,738.16/99,860.40
  6. Step 6: Final answer
    x = 86,648.07

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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.