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Finding the Fourth Proportional to 139,750.71, 192,855.88 and 76,088.50

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Solution

The fourth proportional to 139,750.71, 192,855.88 and 76,088.50 is: 105,002.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,750.71 : 192,855.88 = 76,088.50 : x
  2. Step 2: Convert to fraction form
    139,750.71/192,855.88 = 76,088.50/x
  3. Step 3: Cross multiply
    139,750.71x = 192,855.88 × 76,088.50
  4. Step 4: Simplify right side
    139,750.71x = 14,674,114,625.38
  5. Step 5: Solve for x
    x = 14,674,114,625.38/139,750.71
  6. Step 6: Final answer
    x = 105,002.08

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1.5x scale

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.