Home / 78,310,905.08-117,466,357.61-66,721,554.68

Finding the Fourth Proportional to 78,310,905.08, 117,466,357.61 and 66,721,554.68

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Solution

The fourth proportional to 78,310,905.08, 117,466,357.61 and 66,721,554.68 is: 100,082,332.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,310,905.08 : 117,466,357.61 = 66,721,554.68 : x
  2. Step 2: Convert to fraction form
    78,310,905.08/117,466,357.61 = 66,721,554.68/x
  3. Step 3: Cross multiply
    78,310,905.08x = 117,466,357.61 × 66,721,554.68
  4. Step 4: Simplify right side
    78,310,905.08x = 7,837,538,001,915,521
  5. Step 5: Solve for x
    x = 7,837,538,001,915,521/78,310,905.08
  6. Step 6: Final answer
    x = 100,082,332.01

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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.