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Finding the Fourth Proportional to 98,657,730.80, 147,774,019.80 and 81,651,618.80

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Solution

The fourth proportional to 98,657,730.80, 147,774,019.80 and 81,651,618.80 is: 122,301,494.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,657,730.80 : 147,774,019.80 = 81,651,618.80 : x
  2. Step 2: Convert to fraction form
    98,657,730.80/147,774,019.80 = 81,651,618.80/x
  3. Step 3: Cross multiply
    98,657,730.80x = 147,774,019.80 × 81,651,618.80
  4. Step 4: Simplify right side
    98,657,730.80x = 12,065,987,933,253,252
  5. Step 5: Solve for x
    x = 12,065,987,933,253,252/98,657,730.80
  6. Step 6: Final answer
    x = 122,301,494.63

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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.