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Finding the Fourth Proportional to 93,139.83, 128,529.39 and 52,851.20

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Solution

The fourth proportional to 93,139.83, 128,529.39 and 52,851.20 is: 72,932.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,139.83 : 128,529.39 = 52,851.20 : x
  2. Step 2: Convert to fraction form
    93,139.83/128,529.39 = 52,851.20/x
  3. Step 3: Cross multiply
    93,139.83x = 128,529.39 × 52,851.20
  4. Step 4: Simplify right side
    93,139.83x = 6,792,931,854.12
  5. Step 5: Solve for x
    x = 6,792,931,854.12/93,139.83
  6. Step 6: Final answer
    x = 72,932.62

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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.