Home / 103,533.28-142,678.26-89,188.60

Finding the Fourth Proportional to 103,533.28, 142,678.26 and 89,188.60

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Solution

The fourth proportional to 103,533.28, 142,678.26 and 89,188.60 is: 122,909.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,533.28 : 142,678.26 = 89,188.60 : x
  2. Step 2: Convert to fraction form
    103,533.28/142,678.26 = 89,188.60/x
  3. Step 3: Cross multiply
    103,533.28x = 142,678.26 × 89,188.60
  4. Step 4: Simplify right side
    103,533.28x = 12,725,274,259.84
  5. Step 5: Solve for x
    x = 12,725,274,259.84/103,533.28
  6. Step 6: Final answer
    x = 122,909.99

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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.