Home / 118,408.04-178,308.93-85,360.64

Finding the Fourth Proportional to 118,408.04, 178,308.93 and 85,360.64

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Solution

The fourth proportional to 118,408.04, 178,308.93 and 85,360.64 is: 128,543.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,408.04 : 178,308.93 = 85,360.64 : x
  2. Step 2: Convert to fraction form
    118,408.04/178,308.93 = 85,360.64/x
  3. Step 3: Cross multiply
    118,408.04x = 178,308.93 × 85,360.64
  4. Step 4: Simplify right side
    118,408.04x = 15,220,564,828.29
  5. Step 5: Solve for x
    x = 15,220,564,828.29/118,408.04
  6. Step 6: Final answer
    x = 128,543.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.