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Finding the Fourth Proportional to 99,446,820.80, 148,918,288.80 and 79,291,428.80

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Solution

The fourth proportional to 99,446,820.80, 148,918,288.80 and 79,291,428.80 is: 118,736,263.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,446,820.80 : 148,918,288.80 = 79,291,428.80 : x
  2. Step 2: Convert to fraction form
    99,446,820.80/148,918,288.80 = 79,291,428.80/x
  3. Step 3: Cross multiply
    99,446,820.80x = 148,918,288.80 × 79,291,428.80
  4. Step 4: Simplify right side
    99,446,820.80x = 11,807,943,893,403,038
  5. Step 5: Solve for x
    x = 11,807,943,893,403,038/99,446,820.80
  6. Step 6: Final answer
    x = 118,736,263.25

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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.