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Finding the Fourth Proportional to 56,378.70, 77,799.81 and 30,885.17

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Solution

The fourth proportional to 56,378.70, 77,799.81 and 30,885.17 is: 42,620.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,378.70 : 77,799.81 = 30,885.17 : x
  2. Step 2: Convert to fraction form
    56,378.70/77,799.81 = 30,885.17/x
  3. Step 3: Cross multiply
    56,378.70x = 77,799.81 × 30,885.17
  4. Step 4: Simplify right side
    56,378.70x = 2,402,859,968.82
  5. Step 5: Solve for x
    x = 2,402,859,968.82/56,378.70
  6. Step 6: Final answer
    x = 42,620.00

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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.