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Finding the Fourth Proportional to 98,148.80, 146,834.40 and 85,145.60

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Solution

The fourth proportional to 98,148.80, 146,834.40 and 85,145.60 is: 127,381.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,148.80 : 146,834.40 = 85,145.60 : x
  2. Step 2: Convert to fraction form
    98,148.80/146,834.40 = 85,145.60/x
  3. Step 3: Cross multiply
    98,148.80x = 146,834.40 × 85,145.60
  4. Step 4: Simplify right side
    98,148.80x = 12,502,303,088.64
  5. Step 5: Solve for x
    x = 12,502,303,088.64/98,148.80
  6. Step 6: Final answer
    x = 127,381.11

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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.