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Finding the Fourth Proportional to 70,528,280.80, 105,792,421.20 and 49,924,991.20

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Solution

The fourth proportional to 70,528,280.80, 105,792,421.20 and 49,924,991.20 is: 74,887,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,528,280.80 : 105,792,421.20 = 49,924,991.20 : x
  2. Step 2: Convert to fraction form
    70,528,280.80/105,792,421.20 = 49,924,991.20/x
  3. Step 3: Cross multiply
    70,528,280.80x = 105,792,421.20 × 49,924,991.20
  4. Step 4: Simplify right side
    70,528,280.80x = 5,281,685,697,436,694
  5. Step 5: Solve for x
    x = 5,281,685,697,436,694/70,528,280.80
  6. Step 6: Final answer
    x = 74,887,486.80

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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.