Home / 138,128.15-190,633.71-77,701.34

Finding the Fourth Proportional to 138,128.15, 190,633.71 and 77,701.34

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Solution

The fourth proportional to 138,128.15, 190,633.71 and 77,701.34 is: 107,237.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,128.15 : 190,633.71 = 77,701.34 : x
  2. Step 2: Convert to fraction form
    138,128.15/190,633.71 = 77,701.34/x
  3. Step 3: Cross multiply
    138,128.15x = 190,633.71 × 77,701.34
  4. Step 4: Simplify right side
    138,128.15x = 14,812,493,763.00
  5. Step 5: Solve for x
    x = 14,812,493,763.00/138,128.15
  6. Step 6: Final answer
    x = 107,237.33

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1.5x scale

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.