Home / 129,669.48-178,947.05-72,308.25

Finding the Fourth Proportional to 129,669.48, 178,947.05 and 72,308.25

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Solution

The fourth proportional to 129,669.48, 178,947.05 and 72,308.25 is: 99,787.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,669.48 : 178,947.05 = 72,308.25 : x
  2. Step 2: Convert to fraction form
    129,669.48/178,947.05 = 72,308.25/x
  3. Step 3: Cross multiply
    129,669.48x = 178,947.05 × 72,308.25
  4. Step 4: Simplify right side
    129,669.48x = 12,939,347,666.62
  5. Step 5: Solve for x
    x = 12,939,347,666.62/129,669.48
  6. Step 6: Final answer
    x = 99,787.15

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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.