Home / 212,140.51-318,298.89-85,870.02

Finding the Fourth Proportional to 212,140.51, 318,298.89 and 85,870.02

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Solution

The fourth proportional to 212,140.51, 318,298.89 and 85,870.02 is: 128,840.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,140.51 : 318,298.89 = 85,870.02 : x
  2. Step 2: Convert to fraction form
    212,140.51/318,298.89 = 85,870.02/x
  3. Step 3: Cross multiply
    212,140.51x = 318,298.89 × 85,870.02
  4. Step 4: Simplify right side
    212,140.51x = 27,332,332,050.28
  5. Step 5: Solve for x
    x = 27,332,332,050.28/212,140.51
  6. Step 6: Final answer
    x = 128,840.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.