Home / 138,146.72-190,458.96-90,317.84

Finding the Fourth Proportional to 138,146.72, 190,458.96 and 90,317.84

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Solution

The fourth proportional to 138,146.72, 190,458.96 and 90,317.84 is: 124,518.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,146.72 : 190,458.96 = 90,317.84 : x
  2. Step 2: Convert to fraction form
    138,146.72/190,458.96 = 90,317.84/x
  3. Step 3: Cross multiply
    138,146.72x = 190,458.96 × 90,317.84
  4. Step 4: Simplify right side
    138,146.72x = 17,201,841,875.85
  5. Step 5: Solve for x
    x = 17,201,841,875.85/138,146.72
  6. Step 6: Final answer
    x = 124,518.64

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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.