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Finding the Fourth Proportional to 85,810.86, 128,710.08 and 28,885.14

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Solution

The fourth proportional to 85,810.86, 128,710.08 and 28,885.14 is: 43,325.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810.86 : 128,710.08 = 28,885.14 : x
  2. Step 2: Convert to fraction form
    85,810.86/128,710.08 = 28,885.14/x
  3. Step 3: Cross multiply
    85,810.86x = 128,710.08 × 28,885.14
  4. Step 4: Simplify right side
    85,810.86x = 3,717,808,680.21
  5. Step 5: Solve for x
    x = 3,717,808,680.21/85,810.86
  6. Step 6: Final answer
    x = 43,325.62

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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.