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Finding the Fourth Proportional to 93,397.80, 128,849.96 and 61,140.31

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Solution

The fourth proportional to 93,397.80, 128,849.96 and 61,140.31 is: 84,348.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,397.80 : 128,849.96 = 61,140.31 : x
  2. Step 2: Convert to fraction form
    93,397.80/128,849.96 = 61,140.31/x
  3. Step 3: Cross multiply
    93,397.80x = 128,849.96 × 61,140.31
  4. Step 4: Simplify right side
    93,397.80x = 7,877,926,328.61
  5. Step 5: Solve for x
    x = 7,877,926,328.61/93,397.80
  6. Step 6: Final answer
    x = 84,348.09

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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.