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Finding the Fourth Proportional to 112,176, 154,804.80 and 72,501.12

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Solution

The fourth proportional to 112,176, 154,804.80 and 72,501.12 is: 100,052.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,176 : 154,804.80 = 72,501.12 : x
  2. Step 2: Convert to fraction form
    112,176/154,804.80 = 72,501.12/x
  3. Step 3: Cross multiply
    112,176x = 154,804.80 × 72,501.12
  4. Step 4: Simplify right side
    112,176x = 11,223,521,381.38
  5. Step 5: Solve for x
    x = 11,223,521,381.38/112,176
  6. Step 6: Final answer
    x = 100,052.79

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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.