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Finding the Fourth Proportional to 98,133.72, 135,424.56 and 53,421.72

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Solution

The fourth proportional to 98,133.72, 135,424.56 and 53,421.72 is: 73,721.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,133.72 : 135,424.56 = 53,421.72 : x
  2. Step 2: Convert to fraction form
    98,133.72/135,424.56 = 53,421.72/x
  3. Step 3: Cross multiply
    98,133.72x = 135,424.56 × 53,421.72
  4. Step 4: Simplify right side
    98,133.72x = 7,234,612,925.44
  5. Step 5: Solve for x
    x = 7,234,612,925.44/98,133.72
  6. Step 6: Final answer
    x = 73,721.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.