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Finding the Fourth Proportional to 60,601.70, 90,870.15 and 21,160.10

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Solution

The fourth proportional to 60,601.70, 90,870.15 and 21,160.10 is: 31,728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,601.70 : 90,870.15 = 21,160.10 : x
  2. Step 2: Convert to fraction form
    60,601.70/90,870.15 = 21,160.10/x
  3. Step 3: Cross multiply
    60,601.70x = 90,870.15 × 21,160.10
  4. Step 4: Simplify right side
    60,601.70x = 1,922,821,461.02
  5. Step 5: Solve for x
    x = 1,922,821,461.02/60,601.70
  6. Step 6: Final answer
    x = 31,728.84

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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.