Home / 138,288.80-190,835.36-84,574.40

Finding the Fourth Proportional to 138,288.80, 190,835.36 and 84,574.40

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Solution

The fourth proportional to 138,288.80, 190,835.36 and 84,574.40 is: 116,710.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,288.80 : 190,835.36 = 84,574.40 : x
  2. Step 2: Convert to fraction form
    138,288.80/190,835.36 = 84,574.40/x
  3. Step 3: Cross multiply
    138,288.80x = 190,835.36 × 84,574.40
  4. Step 4: Simplify right side
    138,288.80x = 16,139,786,070.78
  5. Step 5: Solve for x
    x = 16,139,786,070.78/138,288.80
  6. Step 6: Final answer
    x = 116,710.72

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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.