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Finding the Fourth Proportional to 81,580.80, 112,582.80 and 45,281.28

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Solution

The fourth proportional to 81,580.80, 112,582.80 and 45,281.28 is: 62,488.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,580.80 : 112,582.80 = 45,281.28 : x
  2. Step 2: Convert to fraction form
    81,580.80/112,582.80 = 45,281.28/x
  3. Step 3: Cross multiply
    81,580.80x = 112,582.80 × 45,281.28
  4. Step 4: Simplify right side
    81,580.80x = 5,097,893,289.98
  5. Step 5: Solve for x
    x = 5,097,893,289.98/81,580.80
  6. Step 6: Final answer
    x = 62,488.89

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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.