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Finding the Fourth Proportional to 98,892.80, 148,358.40 and 42,732.80

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Solution

The fourth proportional to 98,892.80, 148,358.40 and 42,732.80 is: 64,107.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,892.80 : 148,358.40 = 42,732.80 : x
  2. Step 2: Convert to fraction form
    98,892.80/148,358.40 = 42,732.80/x
  3. Step 3: Cross multiply
    98,892.80x = 148,358.40 × 42,732.80
  4. Step 4: Simplify right side
    98,892.80x = 6,339,769,835.52
  5. Step 5: Solve for x
    x = 6,339,769,835.52/98,892.80
  6. Step 6: Final answer
    x = 64,107.50

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1.5x scale

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.