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Finding the Fourth Proportional to 93,345.52, 128,828.39 and 57,039.50

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Solution

The fourth proportional to 93,345.52, 128,828.39 and 57,039.50 is: 78,721.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,345.52 : 128,828.39 = 57,039.50 : x
  2. Step 2: Convert to fraction form
    93,345.52/128,828.39 = 57,039.50/x
  3. Step 3: Cross multiply
    93,345.52x = 128,828.39 × 57,039.50
  4. Step 4: Simplify right side
    93,345.52x = 7,348,306,307.26
  5. Step 5: Solve for x
    x = 7,348,306,307.26/93,345.52
  6. Step 6: Final answer
    x = 78,721.57

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1.5x scale

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.