Home / 71,208,005.20-106,812,007.80-66,430,430.80

Finding the Fourth Proportional to 71,208,005.20, 106,812,007.80 and 66,430,430.80

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Solution

The fourth proportional to 71,208,005.20, 106,812,007.80 and 66,430,430.80 is: 99,645,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,208,005.20 : 106,812,007.80 = 66,430,430.80 : x
  2. Step 2: Convert to fraction form
    71,208,005.20/106,812,007.80 = 66,430,430.80/x
  3. Step 3: Cross multiply
    71,208,005.20x = 106,812,007.80 × 66,430,430.80
  4. Step 4: Simplify right side
    71,208,005.20x = 7,095,567,692,766,960
  5. Step 5: Solve for x
    x = 7,095,567,692,766,960/71,208,005.20
  6. Step 6: Final answer
    x = 99,645,646.20

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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.