Home / 128,939,424.60-193,409,136.90-77,283,359.40

Finding the Fourth Proportional to 128,939,424.60, 193,409,136.90 and 77,283,359.40

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Solution

The fourth proportional to 128,939,424.60, 193,409,136.90 and 77,283,359.40 is: 115,925,039.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,939,424.60 : 193,409,136.90 = 77,283,359.40 : x
  2. Step 2: Convert to fraction form
    128,939,424.60/193,409,136.90 = 77,283,359.40/x
  3. Step 3: Cross multiply
    128,939,424.60x = 193,409,136.90 × 77,283,359.40
  4. Step 4: Simplify right side
    128,939,424.60x = 14,947,307,838,286,504
  5. Step 5: Solve for x
    x = 14,947,307,838,286,504/128,939,424.60
  6. Step 6: Final answer
    x = 115,925,039.10

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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.