Home / 139,478,742.91-192,400,513.63-87,177,009.79

Finding the Fourth Proportional to 139,478,742.91, 192,400,513.63 and 87,177,009.79

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Solution

The fourth proportional to 139,478,742.91, 192,400,513.63 and 87,177,009.79 is: 120,254,177.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,478,742.91 : 192,400,513.63 = 87,177,009.79 : x
  2. Step 2: Convert to fraction form
    139,478,742.91/192,400,513.63 = 87,177,009.79/x
  3. Step 3: Cross multiply
    139,478,742.91x = 192,400,513.63 × 87,177,009.79
  4. Step 4: Simplify right side
    139,478,742.91x = 16,772,901,460,323,540
  5. Step 5: Solve for x
    x = 16,772,901,460,323,540/139,478,742.91
  6. Step 6: Final answer
    x = 120,254,177.16

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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.