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Finding the Fourth Proportional to 111,409.08, 153,734.88 and 65,463.85

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Solution

The fourth proportional to 111,409.08, 153,734.88 and 65,463.85 is: 90,334.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,409.08 : 153,734.88 = 65,463.85 : x
  2. Step 2: Convert to fraction form
    111,409.08/153,734.88 = 65,463.85/x
  3. Step 3: Cross multiply
    111,409.08x = 153,734.88 × 65,463.85
  4. Step 4: Simplify right side
    111,409.08x = 10,064,077,193.51
  5. Step 5: Solve for x
    x = 10,064,077,193.51/111,409.08
  6. Step 6: Final answer
    x = 90,334.45

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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.