Home / 78,678,439.20-118,017,658.80-78,174,554.40

Finding the Fourth Proportional to 78,678,439.20, 118,017,658.80 and 78,174,554.40

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Solution

The fourth proportional to 78,678,439.20, 118,017,658.80 and 78,174,554.40 is: 117,261,831.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678,439.20 : 118,017,658.80 = 78,174,554.40 : x
  2. Step 2: Convert to fraction form
    78,678,439.20/118,017,658.80 = 78,174,554.40/x
  3. Step 3: Cross multiply
    78,678,439.20x = 118,017,658.80 × 78,174,554.40
  4. Step 4: Simplify right side
    78,678,439.20x = 9,225,977,888,021,240
  5. Step 5: Solve for x
    x = 9,225,977,888,021,240/78,678,439.20
  6. Step 6: Final answer
    x = 117,261,831.60

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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.