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Finding the Fourth Proportional to 70,428,122.40, 98,778,530.40 and 70,428,122.40

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Solution

The fourth proportional to 70,428,122.40, 98,778,530.40 and 70,428,122.40 is: 98,778,530.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,428,122.40 : 98,778,530.40 = 70,428,122.40 : x
  2. Step 2: Convert to fraction form
    70,428,122.40/98,778,530.40 = 70,428,122.40/x
  3. Step 3: Cross multiply
    70,428,122.40x = 98,778,530.40 × 70,428,122.40
  4. Step 4: Simplify right side
    70,428,122.40x = 6,956,786,429,503,322
  5. Step 5: Solve for x
    x = 6,956,786,429,503,322/70,428,122.40
  6. Step 6: Final answer
    x = 98,778,530.40

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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.