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Finding the Fourth Proportional to 73,089.61, 100,864.65 and 39,555.61

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Solution

The fourth proportional to 73,089.61, 100,864.65 and 39,555.61 is: 54,587.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,089.61 : 100,864.65 = 39,555.61 : x
  2. Step 2: Convert to fraction form
    73,089.61/100,864.65 = 39,555.61/x
  3. Step 3: Cross multiply
    73,089.61x = 100,864.65 × 39,555.61
  4. Step 4: Simplify right side
    73,089.61x = 3,989,762,758.19
  5. Step 5: Solve for x
    x = 3,989,762,758.19/73,089.61
  6. Step 6: Final answer
    x = 54,587.28

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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.