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Finding the Fourth Proportional to 139,590.05, 209,386.30 and 39,750.15

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Solution

The fourth proportional to 139,590.05, 209,386.30 and 39,750.15 is: 59,625.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,590.05 : 209,386.30 = 39,750.15 : x
  2. Step 2: Convert to fraction form
    139,590.05/209,386.30 = 39,750.15/x
  3. Step 3: Cross multiply
    139,590.05x = 209,386.30 × 39,750.15
  4. Step 4: Simplify right side
    139,590.05x = 8,323,136,733.57
  5. Step 5: Solve for x
    x = 8,323,136,733.57/139,590.05
  6. Step 6: Final answer
    x = 59,625.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.