Home / 78,396,987.60-117,371,532.60-70,334,830.80

Finding the Fourth Proportional to 78,396,987.60, 117,371,532.60 and 70,334,830.80

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Solution

The fourth proportional to 78,396,987.60, 117,371,532.60 and 70,334,830.80 is: 105,301,327.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,396,987.60 : 117,371,532.60 = 70,334,830.80 : x
  2. Step 2: Convert to fraction form
    78,396,987.60/117,371,532.60 = 70,334,830.80/x
  3. Step 3: Cross multiply
    78,396,987.60x = 117,371,532.60 × 70,334,830.80
  4. Step 4: Simplify right side
    78,396,987.60x = 8,255,306,886,157,683
  5. Step 5: Solve for x
    x = 8,255,306,886,157,683/78,396,987.60
  6. Step 6: Final answer
    x = 105,301,327.75

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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.