Home / 128,589,025.71-177,431,820.10-75,710,294.47

Finding the Fourth Proportional to 128,589,025.71, 177,431,820.10 and 75,710,294.47

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Solution

The fourth proportional to 128,589,025.71, 177,431,820.10 and 75,710,294.47 is: 104,467,821.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,589,025.71 : 177,431,820.10 = 75,710,294.47 : x
  2. Step 2: Convert to fraction form
    128,589,025.71/177,431,820.10 = 75,710,294.47/x
  3. Step 3: Cross multiply
    128,589,025.71x = 177,431,820.10 × 75,710,294.47
  4. Step 4: Simplify right side
    128,589,025.71x = 13,433,415,348,119,064
  5. Step 5: Solve for x
    x = 13,433,415,348,119,064/128,589,025.71
  6. Step 6: Final answer
    x = 104,467,821.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.