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Finding the Fourth Proportional to 85,907.55, 128,830.45 and 29,732.42

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Solution

The fourth proportional to 85,907.55, 128,830.45 and 29,732.42 is: 44,587.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,907.55 : 128,830.45 = 29,732.42 : x
  2. Step 2: Convert to fraction form
    85,907.55/128,830.45 = 29,732.42/x
  3. Step 3: Cross multiply
    85,907.55x = 128,830.45 × 29,732.42
  4. Step 4: Simplify right side
    85,907.55x = 3,830,441,048.19
  5. Step 5: Solve for x
    x = 3,830,441,048.19/85,907.55
  6. Step 6: Final answer
    x = 44,587.94

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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.