Home / 78,730,621.80-118,095,932.70-72,684,004.20

Finding the Fourth Proportional to 78,730,621.80, 118,095,932.70 and 72,684,004.20

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Solution

The fourth proportional to 78,730,621.80, 118,095,932.70 and 72,684,004.20 is: 109,026,006.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730,621.80 : 118,095,932.70 = 72,684,004.20 : x
  2. Step 2: Convert to fraction form
    78,730,621.80/118,095,932.70 = 72,684,004.20/x
  3. Step 3: Cross multiply
    78,730,621.80x = 118,095,932.70 × 72,684,004.20
  4. Step 4: Simplify right side
    78,730,621.80x = 8,583,685,268,369,718
  5. Step 5: Solve for x
    x = 8,583,685,268,369,718/78,730,621.80
  6. Step 6: Final answer
    x = 109,026,006.30

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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.