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Finding the Fourth Proportional to 78,800.40, 106,587.90 and 78,800.40

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Solution

The fourth proportional to 78,800.40, 106,587.90 and 78,800.40 is: 106,587.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,800.40 : 106,587.90 = 78,800.40 : x
  2. Step 2: Convert to fraction form
    78,800.40/106,587.90 = 78,800.40/x
  3. Step 3: Cross multiply
    78,800.40x = 106,587.90 × 78,800.40
  4. Step 4: Simplify right side
    78,800.40x = 8,399,169,155.16
  5. Step 5: Solve for x
    x = 8,399,169,155.16/78,800.40
  6. Step 6: Final answer
    x = 106,587.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.