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Finding the Fourth Proportional to 139,848.50, 192,988.50 and 76,185.74

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Solution

The fourth proportional to 139,848.50, 192,988.50 and 76,185.74 is: 105,135.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,848.50 : 192,988.50 = 76,185.74 : x
  2. Step 2: Convert to fraction form
    139,848.50/192,988.50 = 76,185.74/x
  3. Step 3: Cross multiply
    139,848.50x = 192,988.50 × 76,185.74
  4. Step 4: Simplify right side
    139,848.50x = 14,702,971,683.99
  5. Step 5: Solve for x
    x = 14,702,971,683.99/139,848.50
  6. Step 6: Final answer
    x = 105,135.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.