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Finding the Fourth Proportional to 221,060.16, 305,068.08 and 130,438.32

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Solution

The fourth proportional to 221,060.16, 305,068.08 and 130,438.32 is: 180,007.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,060.16 : 305,068.08 = 130,438.32 : x
  2. Step 2: Convert to fraction form
    221,060.16/305,068.08 = 130,438.32/x
  3. Step 3: Cross multiply
    221,060.16x = 305,068.08 × 130,438.32
  4. Step 4: Simplify right side
    221,060.16x = 39,792,567,840.83
  5. Step 5: Solve for x
    x = 39,792,567,840.83/221,060.16
  6. Step 6: Final answer
    x = 180,007.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.