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Finding the Fourth Proportional to 205,298.40, 307,918.80 and 65,071.20

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Solution

The fourth proportional to 205,298.40, 307,918.80 and 65,071.20 is: 97,597.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,298.40 : 307,918.80 = 65,071.20 : x
  2. Step 2: Convert to fraction form
    205,298.40/307,918.80 = 65,071.20/x
  3. Step 3: Cross multiply
    205,298.40x = 307,918.80 × 65,071.20
  4. Step 4: Simplify right side
    205,298.40x = 20,036,645,818.56
  5. Step 5: Solve for x
    x = 20,036,645,818.56/205,298.40
  6. Step 6: Final answer
    x = 97,597.67

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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.