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Finding the Fourth Proportional to 64,870.20, 97,305.30 and 61,808.40

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Solution

The fourth proportional to 64,870.20, 97,305.30 and 61,808.40 is: 92,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,870.20 : 97,305.30 = 61,808.40 : x
  2. Step 2: Convert to fraction form
    64,870.20/97,305.30 = 61,808.40/x
  3. Step 3: Cross multiply
    64,870.20x = 97,305.30 × 61,808.40
  4. Step 4: Simplify right side
    64,870.20x = 6,014,284,904.52
  5. Step 5: Solve for x
    x = 6,014,284,904.52/64,870.20
  6. Step 6: Final answer
    x = 92,712.60

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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.