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Finding the Fourth Proportional to 57,885.40, 86,828.10 and 28,322.20

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Solution

The fourth proportional to 57,885.40, 86,828.10 and 28,322.20 is: 42,483.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,885.40 : 86,828.10 = 28,322.20 : x
  2. Step 2: Convert to fraction form
    57,885.40/86,828.10 = 28,322.20/x
  3. Step 3: Cross multiply
    57,885.40x = 86,828.10 × 28,322.20
  4. Step 4: Simplify right side
    57,885.40x = 2,459,162,813.82
  5. Step 5: Solve for x
    x = 2,459,162,813.82/57,885.40
  6. Step 6: Final answer
    x = 42,483.30

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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.