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Finding the Fourth Proportional to 101,760.64, 140,430.71 and 56,439.32

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Solution

The fourth proportional to 101,760.64, 140,430.71 and 56,439.32 is: 77,886.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,760.64 : 140,430.71 = 56,439.32 : x
  2. Step 2: Convert to fraction form
    101,760.64/140,430.71 = 56,439.32/x
  3. Step 3: Cross multiply
    101,760.64x = 140,430.71 × 56,439.32
  4. Step 4: Simplify right side
    101,760.64x = 7,925,813,218.46
  5. Step 5: Solve for x
    x = 7,925,813,218.46/101,760.64
  6. Step 6: Final answer
    x = 77,886.83

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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.