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Finding the Fourth Proportional to 115,785, 159,783.30 and 65,482.92

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Solution

The fourth proportional to 115,785, 159,783.30 and 65,482.92 is: 90,366.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,785 : 159,783.30 = 65,482.92 : x
  2. Step 2: Convert to fraction form
    115,785/159,783.30 = 65,482.92/x
  3. Step 3: Cross multiply
    115,785x = 159,783.30 × 65,482.92
  4. Step 4: Simplify right side
    115,785x = 10,463,077,051.24
  5. Step 5: Solve for x
    x = 10,463,077,051.24/115,785
  6. Step 6: Final answer
    x = 90,366.43

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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.