Home / 78,882,603.40-118,323,905.10-66,789,368.20

Finding the Fourth Proportional to 78,882,603.40, 118,323,905.10 and 66,789,368.20

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Solution

The fourth proportional to 78,882,603.40, 118,323,905.10 and 66,789,368.20 is: 100,184,052.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,882,603.40 : 118,323,905.10 = 66,789,368.20 : x
  2. Step 2: Convert to fraction form
    78,882,603.40/118,323,905.10 = 66,789,368.20/x
  3. Step 3: Cross multiply
    78,882,603.40x = 118,323,905.10 × 66,789,368.20
  4. Step 4: Simplify right side
    78,882,603.40x = 7,902,778,864,585,758
  5. Step 5: Solve for x
    x = 7,902,778,864,585,758/78,882,603.40
  6. Step 6: Final answer
    x = 100,184,052.30

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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.