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Finding the Fourth Proportional to 93,142.76, 128,292.14 and 71,591.29

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Solution

The fourth proportional to 93,142.76, 128,292.14 and 71,591.29 is: 98,607.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,142.76 : 128,292.14 = 71,591.29 : x
  2. Step 2: Convert to fraction form
    93,142.76/128,292.14 = 71,591.29/x
  3. Step 3: Cross multiply
    93,142.76x = 128,292.14 × 71,591.29
  4. Step 4: Simplify right side
    93,142.76x = 9,184,599,657.71
  5. Step 5: Solve for x
    x = 9,184,599,657.71/93,142.76
  6. Step 6: Final answer
    x = 98,607.77

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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.