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Finding the Fourth Proportional to 131,646.80, 197,421.60 and 42,903.20

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Solution

The fourth proportional to 131,646.80, 197,421.60 and 42,903.20 is: 64,338.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,646.80 : 197,421.60 = 42,903.20 : x
  2. Step 2: Convert to fraction form
    131,646.80/197,421.60 = 42,903.20/x
  3. Step 3: Cross multiply
    131,646.80x = 197,421.60 × 42,903.20
  4. Step 4: Simplify right side
    131,646.80x = 8,470,018,389.12
  5. Step 5: Solve for x
    x = 8,470,018,389.12/131,646.80
  6. Step 6: Final answer
    x = 64,338.96

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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.