Home / 138,661,629.12-191,353,004.64-76,781,951.28

Finding the Fourth Proportional to 138,661,629.12, 191,353,004.64 and 76,781,951.28

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Solution

The fourth proportional to 138,661,629.12, 191,353,004.64 and 76,781,951.28 is: 105,959,068.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,661,629.12 : 191,353,004.64 = 76,781,951.28 : x
  2. Step 2: Convert to fraction form
    138,661,629.12/191,353,004.64 = 76,781,951.28/x
  3. Step 3: Cross multiply
    138,661,629.12x = 191,353,004.64 × 76,781,951.28
  4. Step 4: Simplify right side
    138,661,629.12x = 14,692,457,079,550,094
  5. Step 5: Solve for x
    x = 14,692,457,079,550,094/138,661,629.12
  6. Step 6: Final answer
    x = 105,959,068.65

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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.