Home / 56,989.60-78,618-40,185.76

Finding the Fourth Proportional to 56,989.60, 78,618 and 40,185.76

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Solution

The fourth proportional to 56,989.60, 78,618 and 40,185.76 is: 55,436.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,989.60 : 78,618 = 40,185.76 : x
  2. Step 2: Convert to fraction form
    56,989.60/78,618 = 40,185.76/x
  3. Step 3: Cross multiply
    56,989.60x = 78,618 × 40,185.76
  4. Step 4: Simplify right side
    56,989.60x = 3,159,324,079.68
  5. Step 5: Solve for x
    x = 3,159,324,079.68/56,989.60
  6. Step 6: Final answer
    x = 55,436.85

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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.