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Finding the Fourth Proportional to 101,707.61, 140,364.79 and 56,399.80

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Solution

The fourth proportional to 101,707.61, 140,364.79 and 56,399.80 is: 77,836.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,707.61 : 140,364.79 = 56,399.80 : x
  2. Step 2: Convert to fraction form
    101,707.61/140,364.79 = 56,399.80/x
  3. Step 3: Cross multiply
    101,707.61x = 140,364.79 × 56,399.80
  4. Step 4: Simplify right side
    101,707.61x = 7,916,545,591.13
  5. Step 5: Solve for x
    x = 7,916,545,591.13/101,707.61
  6. Step 6: Final answer
    x = 77,836.31

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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.