Home / 78,540,940.72-108,385,465.08-43,258,068.40

Finding the Fourth Proportional to 78,540,940.72, 108,385,465.08 and 43,258,068.40

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Solution

The fourth proportional to 78,540,940.72, 108,385,465.08 and 43,258,068.40 is: 59,695,565.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,540,940.72 : 108,385,465.08 = 43,258,068.40 : x
  2. Step 2: Convert to fraction form
    78,540,940.72/108,385,465.08 = 43,258,068.40/x
  3. Step 3: Cross multiply
    78,540,940.72x = 108,385,465.08 × 43,258,068.40
  4. Step 4: Simplify right side
    78,540,940.72x = 4,688,545,861,996,451
  5. Step 5: Solve for x
    x = 4,688,545,861,996,451/78,540,940.72
  6. Step 6: Final answer
    x = 59,695,565.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.