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Finding the Fourth Proportional to 139,088.16, 191,940.30 and 75,424.86

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Solution

The fourth proportional to 139,088.16, 191,940.30 and 75,424.86 is: 104,085.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,088.16 : 191,940.30 = 75,424.86 : x
  2. Step 2: Convert to fraction form
    139,088.16/191,940.30 = 75,424.86/x
  3. Step 3: Cross multiply
    139,088.16x = 191,940.30 × 75,424.86
  4. Step 4: Simplify right side
    139,088.16x = 14,477,070,255.86
  5. Step 5: Solve for x
    x = 14,477,070,255.86/139,088.16
  6. Step 6: Final answer
    x = 104,085.57

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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.