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Finding the Fourth Proportional to 97,696.80, 146,545.20 and 90,698.40

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Solution

The fourth proportional to 97,696.80, 146,545.20 and 90,698.40 is: 136,047.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,696.80 : 146,545.20 = 90,698.40 : x
  2. Step 2: Convert to fraction form
    97,696.80/146,545.20 = 90,698.40/x
  3. Step 3: Cross multiply
    97,696.80x = 146,545.20 × 90,698.40
  4. Step 4: Simplify right side
    97,696.80x = 13,291,415,167.68
  5. Step 5: Solve for x
    x = 13,291,415,167.68/97,696.80
  6. Step 6: Final answer
    x = 136,047.60

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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.