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Finding the Fourth Proportional to 78,697,196.80, 118,045,795.20 and 70,406,717.20

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Solution

The fourth proportional to 78,697,196.80, 118,045,795.20 and 70,406,717.20 is: 105,610,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,697,196.80 : 118,045,795.20 = 70,406,717.20 : x
  2. Step 2: Convert to fraction form
    78,697,196.80/118,045,795.20 = 70,406,717.20/x
  3. Step 3: Cross multiply
    78,697,196.80x = 118,045,795.20 × 70,406,717.20
  4. Step 4: Simplify right side
    78,697,196.80x = 8,311,216,919,295,518
  5. Step 5: Solve for x
    x = 8,311,216,919,295,518/78,697,196.80
  6. Step 6: Final answer
    x = 105,610,075.80

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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.