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Finding the Fourth Proportional to 164,012.80, 245,865.60 and 128,454.40

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Solution

The fourth proportional to 164,012.80, 245,865.60 and 128,454.40 is: 192,561.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,012.80 : 245,865.60 = 128,454.40 : x
  2. Step 2: Convert to fraction form
    164,012.80/245,865.60 = 128,454.40/x
  3. Step 3: Cross multiply
    164,012.80x = 245,865.60 × 128,454.40
  4. Step 4: Simplify right side
    164,012.80x = 31,582,518,128.64
  5. Step 5: Solve for x
    x = 31,582,518,128.64/164,012.80
  6. Step 6: Final answer
    x = 192,561.30

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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.