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Finding the Fourth Proportional to 128,602.50, 192,903.77 and 53,681.77

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Solution

The fourth proportional to 128,602.50, 192,903.77 and 53,681.77 is: 80,522.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602.50 : 192,903.77 = 53,681.77 : x
  2. Step 2: Convert to fraction form
    128,602.50/192,903.77 = 53,681.77/x
  3. Step 3: Cross multiply
    128,602.50x = 192,903.77 × 53,681.77
  4. Step 4: Simplify right side
    128,602.50x = 10,355,415,813.27
  5. Step 5: Solve for x
    x = 10,355,415,813.27/128,602.50
  6. Step 6: Final answer
    x = 80,522.66

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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.