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Finding the Fourth Proportional to 82,905.70, 124,358.55 and 70,075.30

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Solution

The fourth proportional to 82,905.70, 124,358.55 and 70,075.30 is: 105,112.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,905.70 : 124,358.55 = 70,075.30 : x
  2. Step 2: Convert to fraction form
    82,905.70/124,358.55 = 70,075.30/x
  3. Step 3: Cross multiply
    82,905.70x = 124,358.55 × 70,075.30
  4. Step 4: Simplify right side
    82,905.70x = 8,714,462,698.82
  5. Step 5: Solve for x
    x = 8,714,462,698.82/82,905.70
  6. Step 6: Final answer
    x = 105,112.95

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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.