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Finding the Fourth Proportional to 112,179.79, 154,808.18 and 61,878.79

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Solution

The fourth proportional to 112,179.79, 154,808.18 and 61,878.79 is: 85,392.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,179.79 : 154,808.18 = 61,878.79 : x
  2. Step 2: Convert to fraction form
    112,179.79/154,808.18 = 61,878.79/x
  3. Step 3: Cross multiply
    112,179.79x = 154,808.18 × 61,878.79
  4. Step 4: Simplify right side
    112,179.79x = 9,579,342,860.50
  5. Step 5: Solve for x
    x = 9,579,342,860.50/112,179.79
  6. Step 6: Final answer
    x = 85,392.77

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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.