Home / 128,726,839.80-193,090,259.70-74,307,281.40

Finding the Fourth Proportional to 128,726,839.80, 193,090,259.70 and 74,307,281.40

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Solution

The fourth proportional to 128,726,839.80, 193,090,259.70 and 74,307,281.40 is: 111,460,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,726,839.80 : 193,090,259.70 = 74,307,281.40 : x
  2. Step 2: Convert to fraction form
    128,726,839.80/193,090,259.70 = 74,307,281.40/x
  3. Step 3: Cross multiply
    128,726,839.80x = 193,090,259.70 × 74,307,281.40
  4. Step 4: Simplify right side
    128,726,839.80x = 14,348,012,263,126,980
  5. Step 5: Solve for x
    x = 14,348,012,263,126,980/128,726,839.80
  6. Step 6: Final answer
    x = 111,460,922.10

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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.