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Finding the Fourth Proportional to 93,878, 129,551.68 and 51,438.16

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Solution

The fourth proportional to 93,878, 129,551.68 and 51,438.16 is: 70,984.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,878 : 129,551.68 = 51,438.16 : x
  2. Step 2: Convert to fraction form
    93,878/129,551.68 = 51,438.16/x
  3. Step 3: Cross multiply
    93,878x = 129,551.68 × 51,438.16
  4. Step 4: Simplify right side
    93,878x = 6,663,900,044.11
  5. Step 5: Solve for x
    x = 6,663,900,044.11/93,878
  6. Step 6: Final answer
    x = 70,984.68

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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.