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Finding the Fourth Proportional to 47,200.51, 70,800.63 and 12,139.93

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Solution

The fourth proportional to 47,200.51, 70,800.63 and 12,139.93 is: 18,209.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,200.51 : 70,800.63 = 12,139.93 : x
  2. Step 2: Convert to fraction form
    47,200.51/70,800.63 = 12,139.93/x
  3. Step 3: Cross multiply
    47,200.51x = 70,800.63 × 12,139.93
  4. Step 4: Simplify right side
    47,200.51x = 859,514,692.16
  5. Step 5: Solve for x
    x = 859,514,692.16/47,200.51
  6. Step 6: Final answer
    x = 18,209.86

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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.