Home / 111,024.69-153,117.21-78,695.35

Finding the Fourth Proportional to 111,024.69, 153,117.21 and 78,695.35

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Solution

The fourth proportional to 111,024.69, 153,117.21 and 78,695.35 is: 108,530.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,024.69 : 153,117.21 = 78,695.35 : x
  2. Step 2: Convert to fraction form
    111,024.69/153,117.21 = 78,695.35/x
  3. Step 3: Cross multiply
    111,024.69x = 153,117.21 × 78,695.35
  4. Step 4: Simplify right side
    111,024.69x = 12,049,612,431.97
  5. Step 5: Solve for x
    x = 12,049,612,431.97/111,024.69
  6. Step 6: Final answer
    x = 108,530.93

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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.