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Finding the Fourth Proportional to 76,666.65, 105,801.17 and 42,675.51

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Solution

The fourth proportional to 76,666.65, 105,801.17 and 42,675.51 is: 58,892.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,666.65 : 105,801.17 = 42,675.51 : x
  2. Step 2: Convert to fraction form
    76,666.65/105,801.17 = 42,675.51/x
  3. Step 3: Cross multiply
    76,666.65x = 105,801.17 × 42,675.51
  4. Step 4: Simplify right side
    76,666.65x = 4,515,118,888.35
  5. Step 5: Solve for x
    x = 4,515,118,888.35/76,666.65
  6. Step 6: Final answer
    x = 58,892.87

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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.