Home / 193,421,965.40-289,881,005.70-78,312,282.20

Finding the Fourth Proportional to 193,421,965.40, 289,881,005.70 and 78,312,282.20

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Solution

The fourth proportional to 193,421,965.40, 289,881,005.70 and 78,312,282.20 is: 117,366,417.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,421,965.40 : 289,881,005.70 = 78,312,282.20 : x
  2. Step 2: Convert to fraction form
    193,421,965.40/289,881,005.70 = 78,312,282.20/x
  3. Step 3: Cross multiply
    193,421,965.40x = 289,881,005.70 × 78,312,282.20
  4. Step 4: Simplify right side
    193,421,965.40x = 22,701,243,122,798,208
  5. Step 5: Solve for x
    x = 22,701,243,122,798,208/193,421,965.40
  6. Step 6: Final answer
    x = 117,366,417.39

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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.