Home / 128,756,415.60-193,134,623.40-77,612,108.40

Finding the Fourth Proportional to 128,756,415.60, 193,134,623.40 and 77,612,108.40

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Solution

The fourth proportional to 128,756,415.60, 193,134,623.40 and 77,612,108.40 is: 116,418,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,756,415.60 : 193,134,623.40 = 77,612,108.40 : x
  2. Step 2: Convert to fraction form
    128,756,415.60/193,134,623.40 = 77,612,108.40/x
  3. Step 3: Cross multiply
    128,756,415.60x = 193,134,623.40 × 77,612,108.40
  4. Step 4: Simplify right side
    128,756,415.60x = 14,989,585,327,113,978
  5. Step 5: Solve for x
    x = 14,989,585,327,113,978/128,756,415.60
  6. Step 6: Final answer
    x = 116,418,162.60

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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.