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Finding the Fourth Proportional to 93,411.28, 128,910.40 and 53,130.84

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Solution

The fourth proportional to 93,411.28, 128,910.40 and 53,130.84 is: 73,322.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,411.28 : 128,910.40 = 53,130.84 : x
  2. Step 2: Convert to fraction form
    93,411.28/128,910.40 = 53,130.84/x
  3. Step 3: Cross multiply
    93,411.28x = 128,910.40 × 53,130.84
  4. Step 4: Simplify right side
    93,411.28x = 6,849,117,836.74
  5. Step 5: Solve for x
    x = 6,849,117,836.74/93,411.28
  6. Step 6: Final answer
    x = 73,322.17

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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.