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Finding the Fourth Proportional to 72,810.90, 100,244.59 and 56,658.59

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Solution

The fourth proportional to 72,810.90, 100,244.59 and 56,658.59 is: 78,006.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.90 : 100,244.59 = 56,658.59 : x
  2. Step 2: Convert to fraction form
    72,810.90/100,244.59 = 56,658.59/x
  3. Step 3: Cross multiply
    72,810.90x = 100,244.59 × 56,658.59
  4. Step 4: Simplify right side
    72,810.90x = 5,679,716,857.58
  5. Step 5: Solve for x
    x = 5,679,716,857.58/72,810.90
  6. Step 6: Final answer
    x = 78,006.41

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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.