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Finding the Fourth Proportional to 81,907.35, 122,854.95 and 34,510.20

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Solution

The fourth proportional to 81,907.35, 122,854.95 and 34,510.20 is: 51,762.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,907.35 : 122,854.95 = 34,510.20 : x
  2. Step 2: Convert to fraction form
    81,907.35/122,854.95 = 34,510.20/x
  3. Step 3: Cross multiply
    81,907.35x = 122,854.95 × 34,510.20
  4. Step 4: Simplify right side
    81,907.35x = 4,239,748,895.49
  5. Step 5: Solve for x
    x = 4,239,748,895.49/81,907.35
  6. Step 6: Final answer
    x = 51,762.74

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1.5x scale

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.