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Finding the Fourth Proportional to 100,959.72, 139,330.50 and 55,637.58

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Solution

The fourth proportional to 100,959.72, 139,330.50 and 55,637.58 is: 76,783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,959.72 : 139,330.50 = 55,637.58 : x
  2. Step 2: Convert to fraction form
    100,959.72/139,330.50 = 55,637.58/x
  3. Step 3: Cross multiply
    100,959.72x = 139,330.50 × 55,637.58
  4. Step 4: Simplify right side
    100,959.72x = 7,752,011,840.19
  5. Step 5: Solve for x
    x = 7,752,011,840.19/100,959.72
  6. Step 6: Final answer
    x = 76,783.21

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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.