Home / 84,006,281.20-126,009,421.80-78,904,447.60

Finding the Fourth Proportional to 84,006,281.20, 126,009,421.80 and 78,904,447.60

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Solution

The fourth proportional to 84,006,281.20, 126,009,421.80 and 78,904,447.60 is: 118,356,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,006,281.20 : 126,009,421.80 = 78,904,447.60 : x
  2. Step 2: Convert to fraction form
    84,006,281.20/126,009,421.80 = 78,904,447.60/x
  3. Step 3: Cross multiply
    84,006,281.20x = 126,009,421.80 × 78,904,447.60
  4. Step 4: Simplify right side
    84,006,281.20x = 9,942,703,819,524,396
  5. Step 5: Solve for x
    x = 9,942,703,819,524,396/84,006,281.20
  6. Step 6: Final answer
    x = 118,356,671.40

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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.