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Finding the Fourth Proportional to 100,539.63, 138,809.70 and 62,339.76

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Solution

The fourth proportional to 100,539.63, 138,809.70 and 62,339.76 is: 86,069.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,539.63 : 138,809.70 = 62,339.76 : x
  2. Step 2: Convert to fraction form
    100,539.63/138,809.70 = 62,339.76/x
  3. Step 3: Cross multiply
    100,539.63x = 138,809.70 × 62,339.76
  4. Step 4: Simplify right side
    100,539.63x = 8,653,363,383.67
  5. Step 5: Solve for x
    x = 8,653,363,383.67/100,539.63
  6. Step 6: Final answer
    x = 86,069.18

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1.5x scale

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.