Home / 138,935.28-208,152.36-85,534.32

Finding the Fourth Proportional to 138,935.28, 208,152.36 and 85,534.32

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Solution

The fourth proportional to 138,935.28, 208,152.36 and 85,534.32 is: 128,147.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,935.28 : 208,152.36 = 85,534.32 : x
  2. Step 2: Convert to fraction form
    138,935.28/208,152.36 = 85,534.32/x
  3. Step 3: Cross multiply
    138,935.28x = 208,152.36 × 85,534.32
  4. Step 4: Simplify right side
    138,935.28x = 17,804,170,569.00
  5. Step 5: Solve for x
    x = 17,804,170,569.00/138,935.28
  6. Step 6: Final answer
    x = 128,147.22

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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.