Home / 128,726,853.80-193,090,280.70-74,307,295.40

Finding the Fourth Proportional to 128,726,853.80, 193,090,280.70 and 74,307,295.40

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Solution

The fourth proportional to 128,726,853.80, 193,090,280.70 and 74,307,295.40 is: 111,460,943.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,726,853.80 : 193,090,280.70 = 74,307,295.40 : x
  2. Step 2: Convert to fraction form
    128,726,853.80/193,090,280.70 = 74,307,295.40/x
  3. Step 3: Cross multiply
    128,726,853.80x = 193,090,280.70 × 74,307,295.40
  4. Step 4: Simplify right side
    128,726,853.80x = 14,348,016,526,843,820
  5. Step 5: Solve for x
    x = 14,348,016,526,843,820/128,726,853.80
  6. Step 6: Final answer
    x = 111,460,943.10

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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.