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Finding the Fourth Proportional to 105,557.50, 145,670.93 and 57,815.30

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Solution

The fourth proportional to 105,557.50, 145,670.93 and 57,815.30 is: 79,785.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,557.50 : 145,670.93 = 57,815.30 : x
  2. Step 2: Convert to fraction form
    105,557.50/145,670.93 = 57,815.30/x
  3. Step 3: Cross multiply
    105,557.50x = 145,670.93 × 57,815.30
  4. Step 4: Simplify right side
    105,557.50x = 8,422,008,519.23
  5. Step 5: Solve for x
    x = 8,422,008,519.23/105,557.50
  6. Step 6: Final answer
    x = 79,785.98

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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.