Home / 78,880,341.40-118,320,512.10-77,746,600.60

Finding the Fourth Proportional to 78,880,341.40, 118,320,512.10 and 77,746,600.60

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Solution

The fourth proportional to 78,880,341.40, 118,320,512.10 and 77,746,600.60 is: 116,619,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880,341.40 : 118,320,512.10 = 77,746,600.60 : x
  2. Step 2: Convert to fraction form
    78,880,341.40/118,320,512.10 = 77,746,600.60/x
  3. Step 3: Cross multiply
    78,880,341.40x = 118,320,512.10 × 77,746,600.60
  4. Step 4: Simplify right side
    78,880,341.40x = 9,199,017,597,026,166
  5. Step 5: Solve for x
    x = 9,199,017,597,026,166/78,880,341.40
  6. Step 6: Final answer
    x = 116,619,900.90

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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.