Home / 84,091,811.20-126,137,716.80-78,989,977.60

Finding the Fourth Proportional to 84,091,811.20, 126,137,716.80 and 78,989,977.60

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Solution

The fourth proportional to 84,091,811.20, 126,137,716.80 and 78,989,977.60 is: 118,484,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,091,811.20 : 126,137,716.80 = 78,989,977.60 : x
  2. Step 2: Convert to fraction form
    84,091,811.20/126,137,716.80 = 78,989,977.60/x
  3. Step 3: Cross multiply
    84,091,811.20x = 126,137,716.80 × 78,989,977.60
  4. Step 4: Simplify right side
    84,091,811.20x = 9,963,615,424,547,142
  5. Step 5: Solve for x
    x = 9,963,615,424,547,142/84,091,811.20
  6. Step 6: Final answer
    x = 118,484,966.40

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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.