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Finding the Fourth Proportional to 78,807.20, 118,210.80 and 49,258.40

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Solution

The fourth proportional to 78,807.20, 118,210.80 and 49,258.40 is: 73,887.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807.20 : 118,210.80 = 49,258.40 : x
  2. Step 2: Convert to fraction form
    78,807.20/118,210.80 = 49,258.40/x
  3. Step 3: Cross multiply
    78,807.20x = 118,210.80 × 49,258.40
  4. Step 4: Simplify right side
    78,807.20x = 5,822,874,870.72
  5. Step 5: Solve for x
    x = 5,822,874,870.72/78,807.20
  6. Step 6: Final answer
    x = 73,887.60

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1.5x scale

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.