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Finding the Fourth Proportional to 64,840.40, 97,318.20 and 56,085.20

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Solution

The fourth proportional to 64,840.40, 97,318.20 and 56,085.20 is: 84,177.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,840.40 : 97,318.20 = 56,085.20 : x
  2. Step 2: Convert to fraction form
    64,840.40/97,318.20 = 56,085.20/x
  3. Step 3: Cross multiply
    64,840.40x = 97,318.20 × 56,085.20
  4. Step 4: Simplify right side
    64,840.40x = 5,458,110,710.64
  5. Step 5: Solve for x
    x = 5,458,110,710.64/64,840.40
  6. Step 6: Final answer
    x = 84,177.62

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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.