Home / 86,989.40-120,041.35-49,263.92

Finding the Fourth Proportional to 86,989.40, 120,041.35 and 49,263.92

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Solution

The fourth proportional to 86,989.40, 120,041.35 and 49,263.92 is: 67,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,989.40 : 120,041.35 = 49,263.92 : x
  2. Step 2: Convert to fraction form
    86,989.40/120,041.35 = 49,263.92/x
  3. Step 3: Cross multiply
    86,989.40x = 120,041.35 × 49,263.92
  4. Step 4: Simplify right side
    86,989.40x = 5,913,706,739.73
  5. Step 5: Solve for x
    x = 5,913,706,739.73/86,989.40
  6. Step 6: Final answer
    x = 67,981.93

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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.