Home / 105,520.10-145,611.96-57,764.21

Finding the Fourth Proportional to 105,520.10, 145,611.96 and 57,764.21

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Solution

The fourth proportional to 105,520.10, 145,611.96 and 57,764.21 is: 79,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,520.10 : 145,611.96 = 57,764.21 : x
  2. Step 2: Convert to fraction form
    105,520.10/145,611.96 = 57,764.21/x
  3. Step 3: Cross multiply
    105,520.10x = 145,611.96 × 57,764.21
  4. Step 4: Simplify right side
    105,520.10x = 8,411,159,835.95
  5. Step 5: Solve for x
    x = 8,411,159,835.95/105,520.10
  6. Step 6: Final answer
    x = 79,711.45

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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.