Home / 85,128,015.40-127,692,023.10-51,115,791.40

Finding the Fourth Proportional to 85,128,015.40, 127,692,023.10 and 51,115,791.40

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Solution

The fourth proportional to 85,128,015.40, 127,692,023.10 and 51,115,791.40 is: 76,673,687.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,128,015.40 : 127,692,023.10 = 51,115,791.40 : x
  2. Step 2: Convert to fraction form
    85,128,015.40/127,692,023.10 = 51,115,791.40/x
  3. Step 3: Cross multiply
    85,128,015.40x = 127,692,023.10 × 51,115,791.40
  4. Step 4: Simplify right side
    85,128,015.40x = 6,527,078,816,223,581
  5. Step 5: Solve for x
    x = 6,527,078,816,223,581/85,128,015.40
  6. Step 6: Final answer
    x = 76,673,687.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.