Home / 105,219.42-145,202.64-57,472.78

Finding the Fourth Proportional to 105,219.42, 145,202.64 and 57,472.78

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Solution

The fourth proportional to 105,219.42, 145,202.64 and 57,472.78 is: 79,312.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,219.42 : 145,202.64 = 57,472.78 : x
  2. Step 2: Convert to fraction form
    105,219.42/145,202.64 = 57,472.78/x
  3. Step 3: Cross multiply
    105,219.42x = 145,202.64 × 57,472.78
  4. Step 4: Simplify right side
    105,219.42x = 8,345,199,384.14
  5. Step 5: Solve for x
    x = 8,345,199,384.14/105,219.42
  6. Step 6: Final answer
    x = 79,312.35

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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.