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Finding the Fourth Proportional to 152,509.80, 228,874.05 and 85,879.20

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Solution

The fourth proportional to 152,509.80, 228,874.05 and 85,879.20 is: 128,880.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,509.80 : 228,874.05 = 85,879.20 : x
  2. Step 2: Convert to fraction form
    152,509.80/228,874.05 = 85,879.20/x
  3. Step 3: Cross multiply
    152,509.80x = 228,874.05 × 85,879.20
  4. Step 4: Simplify right side
    152,509.80x = 19,655,520,314.76
  5. Step 5: Solve for x
    x = 19,655,520,314.76/152,509.80
  6. Step 6: Final answer
    x = 128,880.38

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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.