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Finding the Fourth Proportional to 103,218.40, 144,330.80 and 103,218.40

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Solution

The fourth proportional to 103,218.40, 144,330.80 and 103,218.40 is: 144,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,218.40 : 144,330.80 = 103,218.40 : x
  2. Step 2: Convert to fraction form
    103,218.40/144,330.80 = 103,218.40/x
  3. Step 3: Cross multiply
    103,218.40x = 144,330.80 × 103,218.40
  4. Step 4: Simplify right side
    103,218.40x = 14,897,594,246.72
  5. Step 5: Solve for x
    x = 14,897,594,246.72/103,218.40
  6. Step 6: Final answer
    x = 144,330.80

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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.