Home / 105,256.78-145,252.64-57,509.10

Finding the Fourth Proportional to 105,256.78, 145,252.64 and 57,509.10

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Solution

The fourth proportional to 105,256.78, 145,252.64 and 57,509.10 is: 79,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,256.78 : 145,252.64 = 57,509.10 : x
  2. Step 2: Convert to fraction form
    105,256.78/145,252.64 = 57,509.10/x
  3. Step 3: Cross multiply
    105,256.78x = 145,252.64 × 57,509.10
  4. Step 4: Simplify right side
    105,256.78x = 8,353,348,742.80
  5. Step 5: Solve for x
    x = 8,353,348,742.80/105,256.78
  6. Step 6: Final answer
    x = 79,361.62

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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.