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Finding the Fourth Proportional to 130,590.90, 180,149.01 and 85,295.40

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Solution

The fourth proportional to 130,590.90, 180,149.01 and 85,295.40 is: 117,664.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,590.90 : 180,149.01 = 85,295.40 : x
  2. Step 2: Convert to fraction form
    130,590.90/180,149.01 = 85,295.40/x
  3. Step 3: Cross multiply
    130,590.90x = 180,149.01 × 85,295.40
  4. Step 4: Simplify right side
    130,590.90x = 15,365,881,867.55
  5. Step 5: Solve for x
    x = 15,365,881,867.55/130,590.90
  6. Step 6: Final answer
    x = 117,664.26

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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.