Home / 81,649,901.60-122,474,852.40-78,878,535.20

Finding the Fourth Proportional to 81,649,901.60, 122,474,852.40 and 78,878,535.20

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Solution

The fourth proportional to 81,649,901.60, 122,474,852.40 and 78,878,535.20 is: 118,317,802.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649,901.60 : 122,474,852.40 = 78,878,535.20 : x
  2. Step 2: Convert to fraction form
    81,649,901.60/122,474,852.40 = 78,878,535.20/x
  3. Step 3: Cross multiply
    81,649,901.60x = 122,474,852.40 × 78,878,535.20
  4. Step 4: Simplify right side
    81,649,901.60x = 9,660,636,956,148,206
  5. Step 5: Solve for x
    x = 9,660,636,956,148,206/81,649,901.60
  6. Step 6: Final answer
    x = 118,317,802.80

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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.