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Finding the Fourth Proportional to 78,976,881.80, 118,465,322.70 and 65,539,953.80

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Solution

The fourth proportional to 78,976,881.80, 118,465,322.70 and 65,539,953.80 is: 98,309,930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,976,881.80 : 118,465,322.70 = 65,539,953.80 : x
  2. Step 2: Convert to fraction form
    78,976,881.80/118,465,322.70 = 65,539,953.80/x
  3. Step 3: Cross multiply
    78,976,881.80x = 118,465,322.70 × 65,539,953.80
  4. Step 4: Simplify right side
    78,976,881.80x = 7,764,211,776,660,091
  5. Step 5: Solve for x
    x = 7,764,211,776,660,091/78,976,881.80
  6. Step 6: Final answer
    x = 98,309,930.70

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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.