Home / 128,746,837.91-177,665,230.08-72,996,009.81

Finding the Fourth Proportional to 128,746,837.91, 177,665,230.08 and 72,996,009.81

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Solution

The fourth proportional to 128,746,837.91, 177,665,230.08 and 72,996,009.81 is: 100,731,428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,746,837.91 : 177,665,230.08 = 72,996,009.81 : x
  2. Step 2: Convert to fraction form
    128,746,837.91/177,665,230.08 = 72,996,009.81/x
  3. Step 3: Cross multiply
    128,746,837.91x = 177,665,230.08 × 72,996,009.81
  4. Step 4: Simplify right side
    128,746,837.91x = 12,968,852,877,815,588
  5. Step 5: Solve for x
    x = 12,968,852,877,815,588/128,746,837.91
  6. Step 6: Final answer
    x = 100,731,428.35

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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.