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Finding the Fourth Proportional to 98,929.88, 136,709.53 and 75,012.20

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Solution

The fourth proportional to 98,929.88, 136,709.53 and 75,012.20 is: 103,658.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,929.88 : 136,709.53 = 75,012.20 : x
  2. Step 2: Convert to fraction form
    98,929.88/136,709.53 = 75,012.20/x
  3. Step 3: Cross multiply
    98,929.88x = 136,709.53 × 75,012.20
  4. Step 4: Simplify right side
    98,929.88x = 10,254,881,735.19
  5. Step 5: Solve for x
    x = 10,254,881,735.19/98,929.88
  6. Step 6: Final answer
    x = 103,658.09

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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.