Home / 85,750.36-128,669.40-40,822.48

Finding the Fourth Proportional to 85,750.36, 128,669.40 and 40,822.48

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Solution

The fourth proportional to 85,750.36, 128,669.40 and 40,822.48 is: 61,254.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,750.36 : 128,669.40 = 40,822.48 : x
  2. Step 2: Convert to fraction form
    85,750.36/128,669.40 = 40,822.48/x
  3. Step 3: Cross multiply
    85,750.36x = 128,669.40 × 40,822.48
  4. Step 4: Simplify right side
    85,750.36x = 5,252,604,008.11
  5. Step 5: Solve for x
    x = 5,252,604,008.11/85,750.36
  6. Step 6: Final answer
    x = 61,254.60

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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.