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Finding the Fourth Proportional to 98,601.70, 147,902.55 and 86,937.70

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Solution

The fourth proportional to 98,601.70, 147,902.55 and 86,937.70 is: 130,406.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,601.70 : 147,902.55 = 86,937.70 : x
  2. Step 2: Convert to fraction form
    98,601.70/147,902.55 = 86,937.70/x
  3. Step 3: Cross multiply
    98,601.70x = 147,902.55 × 86,937.70
  4. Step 4: Simplify right side
    98,601.70x = 12,858,307,521.14
  5. Step 5: Solve for x
    x = 12,858,307,521.14/98,601.70
  6. Step 6: Final answer
    x = 130,406.55

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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.