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Finding the Fourth Proportional to 154,876.66, 213,804.87 and 103,870.76

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Solution

The fourth proportional to 154,876.66, 213,804.87 and 103,870.76 is: 143,391.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,876.66 : 213,804.87 = 103,870.76 : x
  2. Step 2: Convert to fraction form
    154,876.66/213,804.87 = 103,870.76/x
  3. Step 3: Cross multiply
    154,876.66x = 213,804.87 × 103,870.76
  4. Step 4: Simplify right side
    154,876.66x = 22,208,072,880.06
  5. Step 5: Solve for x
    x = 22,208,072,880.06/154,876.66
  6. Step 6: Final answer
    x = 143,391.99

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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.