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Finding the Fourth Proportional to 56,489.79, 77,953.30 and 30,995.53

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Solution

The fourth proportional to 56,489.79, 77,953.30 and 30,995.53 is: 42,772.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,489.79 : 77,953.30 = 30,995.53 : x
  2. Step 2: Convert to fraction form
    56,489.79/77,953.30 = 30,995.53/x
  3. Step 3: Cross multiply
    56,489.79x = 77,953.30 × 30,995.53
  4. Step 4: Simplify right side
    56,489.79x = 2,416,203,750.73
  5. Step 5: Solve for x
    x = 2,416,203,750.73/56,489.79
  6. Step 6: Final answer
    x = 42,772.40

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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.