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Finding the Fourth Proportional to 70,970.60, 97,938.10 and 39,142.52

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Solution

The fourth proportional to 70,970.60, 97,938.10 and 39,142.52 is: 54,015.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,970.60 : 97,938.10 = 39,142.52 : x
  2. Step 2: Convert to fraction form
    70,970.60/97,938.10 = 39,142.52/x
  3. Step 3: Cross multiply
    70,970.60x = 97,938.10 × 39,142.52
  4. Step 4: Simplify right side
    70,970.60x = 3,833,544,038.01
  5. Step 5: Solve for x
    x = 3,833,544,038.01/70,970.60
  6. Step 6: Final answer
    x = 54,015.95

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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.