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Finding the Fourth Proportional to 139,328.16, 192,270.24 and 78,897.84

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Solution

The fourth proportional to 139,328.16, 192,270.24 and 78,897.84 is: 108,877.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,328.16 : 192,270.24 = 78,897.84 : x
  2. Step 2: Convert to fraction form
    139,328.16/192,270.24 = 78,897.84/x
  3. Step 3: Cross multiply
    139,328.16x = 192,270.24 × 78,897.84
  4. Step 4: Simplify right side
    139,328.16x = 15,169,706,632.28
  5. Step 5: Solve for x
    x = 15,169,706,632.28/139,328.16
  6. Step 6: Final answer
    x = 108,877.54

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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.