Home / 128,817,007.20-193,225,510.80-103,307,839.20

Finding the Fourth Proportional to 128,817,007.20, 193,225,510.80 and 103,307,839.20

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Solution

The fourth proportional to 128,817,007.20, 193,225,510.80 and 103,307,839.20 is: 154,961,758.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,817,007.20 : 193,225,510.80 = 103,307,839.20 : x
  2. Step 2: Convert to fraction form
    128,817,007.20/193,225,510.80 = 103,307,839.20/x
  3. Step 3: Cross multiply
    128,817,007.20x = 193,225,510.80 × 103,307,839.20
  4. Step 4: Simplify right side
    128,817,007.20x = 19,961,709,999,064,264
  5. Step 5: Solve for x
    x = 19,961,709,999,064,264/128,817,007.20
  6. Step 6: Final answer
    x = 154,961,758.80

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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.