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Finding the Fourth Proportional to 103,128.80, 144,030.40 and 103,128.80

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Solution

The fourth proportional to 103,128.80, 144,030.40 and 103,128.80 is: 144,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,128.80 : 144,030.40 = 103,128.80 : x
  2. Step 2: Convert to fraction form
    103,128.80/144,030.40 = 103,128.80/x
  3. Step 3: Cross multiply
    103,128.80x = 144,030.40 × 103,128.80
  4. Step 4: Simplify right side
    103,128.80x = 14,853,682,315.52
  5. Step 5: Solve for x
    x = 14,853,682,315.52/103,128.80
  6. Step 6: Final answer
    x = 144,030.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.