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Finding the Fourth Proportional to 103,280.80, 154,690.80 and 84,848.80

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Solution

The fourth proportional to 103,280.80, 154,690.80 and 84,848.80 is: 127,083.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,280.80 : 154,690.80 = 84,848.80 : x
  2. Step 2: Convert to fraction form
    103,280.80/154,690.80 = 84,848.80/x
  3. Step 3: Cross multiply
    103,280.80x = 154,690.80 × 84,848.80
  4. Step 4: Simplify right side
    103,280.80x = 13,125,328,751.04
  5. Step 5: Solve for x
    x = 13,125,328,751.04/103,280.80
  6. Step 6: Final answer
    x = 127,083.92

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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.