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Finding the Fourth Proportional to 93,871.60, 129,539.52 and 51,429.76

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Solution

The fourth proportional to 93,871.60, 129,539.52 and 51,429.76 is: 70,971.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,871.60 : 129,539.52 = 51,429.76 : x
  2. Step 2: Convert to fraction form
    93,871.60/129,539.52 = 51,429.76/x
  3. Step 3: Cross multiply
    93,871.60x = 129,539.52 × 51,429.76
  4. Step 4: Simplify right side
    93,871.60x = 6,662,186,424.12
  5. Step 5: Solve for x
    x = 6,662,186,424.12/93,871.60
  6. Step 6: Final answer
    x = 70,971.27

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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.