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Finding the Fourth Proportional to 139,379.77, 192,328.65 and 77,288.69

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Solution

The fourth proportional to 139,379.77, 192,328.65 and 77,288.69 is: 106,649.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,379.77 : 192,328.65 = 77,288.69 : x
  2. Step 2: Convert to fraction form
    139,379.77/192,328.65 = 77,288.69/x
  3. Step 3: Cross multiply
    139,379.77x = 192,328.65 × 77,288.69
  4. Step 4: Simplify right side
    139,379.77x = 14,864,830,437.76
  5. Step 5: Solve for x
    x = 14,864,830,437.76/139,379.77
  6. Step 6: Final answer
    x = 106,649.84

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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.