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Finding the Fourth Proportional to 98,203.45, 135,510.23 and 65,931.53

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Solution

The fourth proportional to 98,203.45, 135,510.23 and 65,931.53 is: 90,978.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,203.45 : 135,510.23 = 65,931.53 : x
  2. Step 2: Convert to fraction form
    98,203.45/135,510.23 = 65,931.53/x
  3. Step 3: Cross multiply
    98,203.45x = 135,510.23 × 65,931.53
  4. Step 4: Simplify right side
    98,203.45x = 8,934,395,787.34
  5. Step 5: Solve for x
    x = 8,934,395,787.34/98,203.45
  6. Step 6: Final answer
    x = 90,978.44

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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.