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Finding the Fourth Proportional to 93,403.62, 128,900.70 and 53,121.06

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Solution

The fourth proportional to 93,403.62, 128,900.70 and 53,121.06 is: 73,309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,403.62 : 128,900.70 = 53,121.06 : x
  2. Step 2: Convert to fraction form
    93,403.62/128,900.70 = 53,121.06/x
  3. Step 3: Cross multiply
    93,403.62x = 128,900.70 × 53,121.06
  4. Step 4: Simplify right side
    93,403.62x = 6,847,341,818.74
  5. Step 5: Solve for x
    x = 6,847,341,818.74/93,403.62
  6. Step 6: Final answer
    x = 73,309.17

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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.