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Finding the Fourth Proportional to 145,478.70, 200,730.52 and 85,037.65

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Solution

The fourth proportional to 145,478.70, 200,730.52 and 85,037.65 is: 117,334.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,478.70 : 200,730.52 = 85,037.65 : x
  2. Step 2: Convert to fraction form
    145,478.70/200,730.52 = 85,037.65/x
  3. Step 3: Cross multiply
    145,478.70x = 200,730.52 × 85,037.65
  4. Step 4: Simplify right side
    145,478.70x = 17,069,651,308.55
  5. Step 5: Solve for x
    x = 17,069,651,308.55/145,478.70
  6. Step 6: Final answer
    x = 117,334.37

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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.