Home / 109,043,003.20-163,564,504.80-78,432,001.60

Finding the Fourth Proportional to 109,043,003.20, 163,564,504.80 and 78,432,001.60

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Solution

The fourth proportional to 109,043,003.20, 163,564,504.80 and 78,432,001.60 is: 117,648,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,043,003.20 : 163,564,504.80 = 78,432,001.60 : x
  2. Step 2: Convert to fraction form
    109,043,003.20/163,564,504.80 = 78,432,001.60/x
  3. Step 3: Cross multiply
    109,043,003.20x = 163,564,504.80 × 78,432,001.60
  4. Step 4: Simplify right side
    109,043,003.20x = 12,828,691,502,176,808
  5. Step 5: Solve for x
    x = 12,828,691,502,176,808/109,043,003.20
  6. Step 6: Final answer
    x = 117,648,002.40

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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.