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Finding the Fourth Proportional to 128,570.40, 192,868.28 and 44,319.47

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Solution

The fourth proportional to 128,570.40, 192,868.28 and 44,319.47 is: 66,483.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,570.40 : 192,868.28 = 44,319.47 : x
  2. Step 2: Convert to fraction form
    128,570.40/192,868.28 = 44,319.47/x
  3. Step 3: Cross multiply
    128,570.40x = 192,868.28 × 44,319.47
  4. Step 4: Simplify right side
    128,570.40x = 8,547,819,818.93
  5. Step 5: Solve for x
    x = 8,547,819,818.93/128,570.40
  6. Step 6: Final answer
    x = 66,483.58

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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.