Home / 130,988.96-180,786.64-77,287.28

Finding the Fourth Proportional to 130,988.96, 180,786.64 and 77,287.28

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Solution

The fourth proportional to 130,988.96, 180,786.64 and 77,287.28 is: 106,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,988.96 : 180,786.64 = 77,287.28 : x
  2. Step 2: Convert to fraction form
    130,988.96/180,786.64 = 77,287.28/x
  3. Step 3: Cross multiply
    130,988.96x = 180,786.64 × 77,287.28
  4. Step 4: Simplify right side
    130,988.96x = 13,972,507,665.94
  5. Step 5: Solve for x
    x = 13,972,507,665.94/130,988.96
  6. Step 6: Final answer
    x = 106,669.35

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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.