Home / 128,896,342.40-193,344,513.60-77,935,548.80

Finding the Fourth Proportional to 128,896,342.40, 193,344,513.60 and 77,935,548.80

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Solution

The fourth proportional to 128,896,342.40, 193,344,513.60 and 77,935,548.80 is: 116,903,323.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896,342.40 : 193,344,513.60 = 77,935,548.80 : x
  2. Step 2: Convert to fraction form
    128,896,342.40/193,344,513.60 = 77,935,548.80/x
  3. Step 3: Cross multiply
    128,896,342.40x = 193,344,513.60 × 77,935,548.80
  4. Step 4: Simplify right side
    128,896,342.40x = 15,068,410,774,885,062
  5. Step 5: Solve for x
    x = 15,068,410,774,885,062/128,896,342.40
  6. Step 6: Final answer
    x = 116,903,323.20

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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.