Home / 85,907.12-128,829.78-29,731.98

Finding the Fourth Proportional to 85,907.12, 128,829.78 and 29,731.98

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Solution

The fourth proportional to 85,907.12, 128,829.78 and 29,731.98 is: 44,587.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,907.12 : 128,829.78 = 29,731.98 : x
  2. Step 2: Convert to fraction form
    85,907.12/128,829.78 = 29,731.98/x
  3. Step 3: Cross multiply
    85,907.12x = 128,829.78 × 29,731.98
  4. Step 4: Simplify right side
    85,907.12x = 3,830,364,442.36
  5. Step 5: Solve for x
    x = 3,830,364,442.36/85,907.12
  6. Step 6: Final answer
    x = 44,587.28

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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.