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Finding the Fourth Proportional to 101,642.65, 140,260.51 and 56,317.98

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Solution

The fourth proportional to 101,642.65, 140,260.51 and 56,317.98 is: 77,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,642.65 : 140,260.51 = 56,317.98 : x
  2. Step 2: Convert to fraction form
    101,642.65/140,260.51 = 56,317.98/x
  3. Step 3: Cross multiply
    101,642.65x = 140,260.51 × 56,317.98
  4. Step 4: Simplify right side
    101,642.65x = 7,899,189,193.34
  5. Step 5: Solve for x
    x = 7,899,189,193.34/101,642.65
  6. Step 6: Final answer
    x = 77,715.30

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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.