Home / 81,585.10-122,262.78-64,870.95

Finding the Fourth Proportional to 81,585.10, 122,262.78 and 64,870.95

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Solution

The fourth proportional to 81,585.10, 122,262.78 and 64,870.95 is: 97,215.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,585.10 : 122,262.78 = 64,870.95 : x
  2. Step 2: Convert to fraction form
    81,585.10/122,262.78 = 64,870.95/x
  3. Step 3: Cross multiply
    81,585.10x = 122,262.78 × 64,870.95
  4. Step 4: Simplify right side
    81,585.10x = 7,931,302,688.24
  5. Step 5: Solve for x
    x = 7,931,302,688.24/81,585.10
  6. Step 6: Final answer
    x = 97,215.09

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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.