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Finding the Fourth Proportional to 98,603.40, 147,686.40 and 85,481.40

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Solution

The fourth proportional to 98,603.40, 147,686.40 and 85,481.40 is: 128,032.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,603.40 : 147,686.40 = 85,481.40 : x
  2. Step 2: Convert to fraction form
    98,603.40/147,686.40 = 85,481.40/x
  3. Step 3: Cross multiply
    98,603.40x = 147,686.40 × 85,481.40
  4. Step 4: Simplify right side
    98,603.40x = 12,624,440,232.96
  5. Step 5: Solve for x
    x = 12,624,440,232.96/98,603.40
  6. Step 6: Final answer
    x = 128,032.50

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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.