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Finding the Fourth Proportional to 70,658,666.40, 105,987,999.60 and 55,353,165.60

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Solution

The fourth proportional to 70,658,666.40, 105,987,999.60 and 55,353,165.60 is: 83,029,748.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,658,666.40 : 105,987,999.60 = 55,353,165.60 : x
  2. Step 2: Convert to fraction form
    70,658,666.40/105,987,999.60 = 55,353,165.60/x
  3. Step 3: Cross multiply
    70,658,666.40x = 105,987,999.60 × 55,353,165.60
  4. Step 4: Simplify right side
    70,658,666.40x = 5,866,771,293,471,534
  5. Step 5: Solve for x
    x = 5,866,771,293,471,534/70,658,666.40
  6. Step 6: Final answer
    x = 83,029,748.40

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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.