Home / 128,896,005.40-193,344,008.10-77,935,211.80

Finding the Fourth Proportional to 128,896,005.40, 193,344,008.10 and 77,935,211.80

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Solution

The fourth proportional to 128,896,005.40, 193,344,008.10 and 77,935,211.80 is: 116,902,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896,005.40 : 193,344,008.10 = 77,935,211.80 : x
  2. Step 2: Convert to fraction form
    128,896,005.40/193,344,008.10 = 77,935,211.80/x
  3. Step 3: Cross multiply
    128,896,005.40x = 193,344,008.10 × 77,935,211.80
  4. Step 4: Simplify right side
    128,896,005.40x = 15,068,306,221,534,414
  5. Step 5: Solve for x
    x = 15,068,306,221,534,414/128,896,005.40
  6. Step 6: Final answer
    x = 116,902,817.70

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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.