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Finding the Fourth Proportional to 98,464.40, 147,712.80 and 42,331.40

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Solution

The fourth proportional to 98,464.40, 147,712.80 and 42,331.40 is: 63,504.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,464.40 : 147,712.80 = 42,331.40 : x
  2. Step 2: Convert to fraction form
    98,464.40/147,712.80 = 42,331.40/x
  3. Step 3: Cross multiply
    98,464.40x = 147,712.80 × 42,331.40
  4. Step 4: Simplify right side
    98,464.40x = 6,252,889,621.92
  5. Step 5: Solve for x
    x = 6,252,889,621.92/98,464.40
  6. Step 6: Final answer
    x = 63,504.06

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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.