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Finding the Fourth Proportional to 93,210.94, 128,538.74 and 57,393.98

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Solution

The fourth proportional to 93,210.94, 128,538.74 and 57,393.98 is: 79,146.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,210.94 : 128,538.74 = 57,393.98 : x
  2. Step 2: Convert to fraction form
    93,210.94/128,538.74 = 57,393.98/x
  3. Step 3: Cross multiply
    93,210.94x = 128,538.74 × 57,393.98
  4. Step 4: Simplify right side
    93,210.94x = 7,377,349,373.58
  5. Step 5: Solve for x
    x = 7,377,349,373.58/93,210.94
  6. Step 6: Final answer
    x = 79,146.82

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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.