Home / 86,931.60-119,994.12-51,119.88

Finding the Fourth Proportional to 86,931.60, 119,994.12 and 51,119.88

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Solution

The fourth proportional to 86,931.60, 119,994.12 and 51,119.88 is: 70,562.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,931.60 : 119,994.12 = 51,119.88 : x
  2. Step 2: Convert to fraction form
    86,931.60/119,994.12 = 51,119.88/x
  3. Step 3: Cross multiply
    86,931.60x = 119,994.12 × 51,119.88
  4. Step 4: Simplify right side
    86,931.60x = 6,134,085,015.11
  5. Step 5: Solve for x
    x = 6,134,085,015.11/86,931.60
  6. Step 6: Final answer
    x = 70,562.20

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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.