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Finding the Fourth Proportional to 128,387.04, 192,599.02 and 39,647.40

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Solution

The fourth proportional to 128,387.04, 192,599.02 and 39,647.40 is: 59,476.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,387.04 : 192,599.02 = 39,647.40 : x
  2. Step 2: Convert to fraction form
    128,387.04/192,599.02 = 39,647.40/x
  3. Step 3: Cross multiply
    128,387.04x = 192,599.02 × 39,647.40
  4. Step 4: Simplify right side
    128,387.04x = 7,636,050,385.55
  5. Step 5: Solve for x
    x = 7,636,050,385.55/128,387.04
  6. Step 6: Final answer
    x = 59,476.80

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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.