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Finding the Fourth Proportional to 112,124.16, 154,728.16 and 61,823.20

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Solution

The fourth proportional to 112,124.16, 154,728.16 and 61,823.20 is: 85,314.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,124.16 : 154,728.16 = 61,823.20 : x
  2. Step 2: Convert to fraction form
    112,124.16/154,728.16 = 61,823.20/x
  3. Step 3: Cross multiply
    112,124.16x = 154,728.16 × 61,823.20
  4. Step 4: Simplify right side
    112,124.16x = 9,565,789,981.31
  5. Step 5: Solve for x
    x = 9,565,789,981.31/112,124.16
  6. Step 6: Final answer
    x = 85,314.26

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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.