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Finding the Fourth Proportional to 65,390.70, 97,826.85 and 56,721.90

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Solution

The fourth proportional to 65,390.70, 97,826.85 and 56,721.90 is: 84,858.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,390.70 : 97,826.85 = 56,721.90 : x
  2. Step 2: Convert to fraction form
    65,390.70/97,826.85 = 56,721.90/x
  3. Step 3: Cross multiply
    65,390.70x = 97,826.85 × 56,721.90
  4. Step 4: Simplify right side
    65,390.70x = 5,548,924,803.02
  5. Step 5: Solve for x
    x = 5,548,924,803.02/65,390.70
  6. Step 6: Final answer
    x = 84,858.01

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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.