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Finding the Fourth Proportional to 81,760.72, 112,830.80 and 45,948.64

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Solution

The fourth proportional to 81,760.72, 112,830.80 and 45,948.64 is: 63,409.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,760.72 : 112,830.80 = 45,948.64 : x
  2. Step 2: Convert to fraction form
    81,760.72/112,830.80 = 45,948.64/x
  3. Step 3: Cross multiply
    81,760.72x = 112,830.80 × 45,948.64
  4. Step 4: Simplify right side
    81,760.72x = 5,184,421,810.11
  5. Step 5: Solve for x
    x = 5,184,421,810.11/81,760.72
  6. Step 6: Final answer
    x = 63,409.69

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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.