Home / 128,976,681.60-193,465,022.40-77,958,345.60

Finding the Fourth Proportional to 128,976,681.60, 193,465,022.40 and 77,958,345.60

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Solution

The fourth proportional to 128,976,681.60, 193,465,022.40 and 77,958,345.60 is: 116,937,518.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,976,681.60 : 193,465,022.40 = 77,958,345.60 : x
  2. Step 2: Convert to fraction form
    128,976,681.60/193,465,022.40 = 77,958,345.60/x
  3. Step 3: Cross multiply
    128,976,681.60x = 193,465,022.40 × 77,958,345.60
  4. Step 4: Simplify right side
    128,976,681.60x = 15,082,213,077,770,940
  5. Step 5: Solve for x
    x = 15,082,213,077,770,940/128,976,681.60
  6. Step 6: Final answer
    x = 116,937,518.40

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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.