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Finding the Fourth Proportional to 112,171.75, 154,807.95 and 61,870.75

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Solution

The fourth proportional to 112,171.75, 154,807.95 and 61,870.75 is: 85,387.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,171.75 : 154,807.95 = 61,870.75 : x
  2. Step 2: Convert to fraction form
    112,171.75/154,807.95 = 61,870.75/x
  3. Step 3: Cross multiply
    112,171.75x = 154,807.95 × 61,870.75
  4. Step 4: Simplify right side
    112,171.75x = 9,578,083,972.46
  5. Step 5: Solve for x
    x = 9,578,083,972.46/112,171.75
  6. Step 6: Final answer
    x = 85,387.67

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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.