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Finding the Fourth Proportional to 97,658.40, 146,800.80 and 90,724.80

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Solution

The fourth proportional to 97,658.40, 146,800.80 and 90,724.80 is: 136,378.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,658.40 : 146,800.80 = 90,724.80 : x
  2. Step 2: Convert to fraction form
    97,658.40/146,800.80 = 90,724.80/x
  3. Step 3: Cross multiply
    97,658.40x = 146,800.80 × 90,724.80
  4. Step 4: Simplify right side
    97,658.40x = 13,318,473,219.84
  5. Step 5: Solve for x
    x = 13,318,473,219.84/97,658.40
  6. Step 6: Final answer
    x = 136,378.16

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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.