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Finding the Fourth Proportional to 99,668,486.80, 149,502,730.20 and 61,205,280.40

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Solution

The fourth proportional to 99,668,486.80, 149,502,730.20 and 61,205,280.40 is: 91,807,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,668,486.80 : 149,502,730.20 = 61,205,280.40 : x
  2. Step 2: Convert to fraction form
    99,668,486.80/149,502,730.20 = 61,205,280.40/x
  3. Step 3: Cross multiply
    99,668,486.80x = 149,502,730.20 × 61,205,280.40
  4. Step 4: Simplify right side
    99,668,486.80x = 9,150,356,522,456,548
  5. Step 5: Solve for x
    x = 9,150,356,522,456,548/99,668,486.80
  6. Step 6: Final answer
    x = 91,807,920.60

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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.