Home / 85,335.78-128,018.55-29,181.51

Finding the Fourth Proportional to 85,335.78, 128,018.55 and 29,181.51

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Solution

The fourth proportional to 85,335.78, 128,018.55 and 29,181.51 is: 43,777.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,335.78 : 128,018.55 = 29,181.51 : x
  2. Step 2: Convert to fraction form
    85,335.78/128,018.55 = 29,181.51/x
  3. Step 3: Cross multiply
    85,335.78x = 128,018.55 × 29,181.51
  4. Step 4: Simplify right side
    85,335.78x = 3,735,774,597.01
  5. Step 5: Solve for x
    x = 3,735,774,597.01/85,335.78
  6. Step 6: Final answer
    x = 43,777.35

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1.5x scale

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.