Home / 128,838,517.50-177,797,154.15-70,891,765.50

Finding the Fourth Proportional to 128,838,517.50, 177,797,154.15 and 70,891,765.50

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Solution

The fourth proportional to 128,838,517.50, 177,797,154.15 and 70,891,765.50 is: 97,830,636.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,838,517.50 : 177,797,154.15 = 70,891,765.50 : x
  2. Step 2: Convert to fraction form
    128,838,517.50/177,797,154.15 = 70,891,765.50/x
  3. Step 3: Cross multiply
    128,838,517.50x = 177,797,154.15 × 70,891,765.50
  4. Step 4: Simplify right side
    128,838,517.50x = 12,604,354,158,569,152
  5. Step 5: Solve for x
    x = 12,604,354,158,569,152/128,838,517.50
  6. Step 6: Final answer
    x = 97,830,636.39

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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.