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Finding the Fourth Proportional to 105,357.66, 145,393.62 and 57,611.40

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Solution

The fourth proportional to 105,357.66, 145,393.62 and 57,611.40 is: 79,503.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,357.66 : 145,393.62 = 57,611.40 : x
  2. Step 2: Convert to fraction form
    105,357.66/145,393.62 = 57,611.40/x
  3. Step 3: Cross multiply
    105,357.66x = 145,393.62 × 57,611.40
  4. Step 4: Simplify right side
    105,357.66x = 8,376,329,999.27
  5. Step 5: Solve for x
    x = 8,376,329,999.27/105,357.66
  6. Step 6: Final answer
    x = 79,503.76

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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.