Home / 138,149,939.79-190,732,955.96-87,942,487.25

Finding the Fourth Proportional to 138,149,939.79, 190,732,955.96 and 87,942,487.25

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Solution

The fourth proportional to 138,149,939.79, 190,732,955.96 and 87,942,487.25 is: 121,415,402.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,149,939.79 : 190,732,955.96 = 87,942,487.25 : x
  2. Step 2: Convert to fraction form
    138,149,939.79/190,732,955.96 = 87,942,487.25/x
  3. Step 3: Cross multiply
    138,149,939.79x = 190,732,955.96 × 87,942,487.25
  4. Step 4: Simplify right side
    138,149,939.79x = 16,773,530,547,227,400
  5. Step 5: Solve for x
    x = 16,773,530,547,227,400/138,149,939.79
  6. Step 6: Final answer
    x = 121,415,402.52

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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.