Home / 105,405.64-145,520-69,699.24

Finding the Fourth Proportional to 105,405.64, 145,520 and 69,699.24

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Solution

The fourth proportional to 105,405.64, 145,520 and 69,699.24 is: 96,224.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,405.64 : 145,520 = 69,699.24 : x
  2. Step 2: Convert to fraction form
    105,405.64/145,520 = 69,699.24/x
  3. Step 3: Cross multiply
    105,405.64x = 145,520 × 69,699.24
  4. Step 4: Simplify right side
    105,405.64x = 10,142,633,404.80
  5. Step 5: Solve for x
    x = 10,142,633,404.80/105,405.64
  6. Step 6: Final answer
    x = 96,224.77

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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.