Home / 81,206.56-121,637-46,128.16

Finding the Fourth Proportional to 81,206.56, 121,637 and 46,128.16

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Solution

The fourth proportional to 81,206.56, 121,637 and 46,128.16 is: 69,094.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,206.56 : 121,637 = 46,128.16 : x
  2. Step 2: Convert to fraction form
    81,206.56/121,637 = 46,128.16/x
  3. Step 3: Cross multiply
    81,206.56x = 121,637 × 46,128.16
  4. Step 4: Simplify right side
    81,206.56x = 5,610,890,997.92
  5. Step 5: Solve for x
    x = 5,610,890,997.92/81,206.56
  6. Step 6: Final answer
    x = 69,094.06

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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.