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Finding the Fourth Proportional to 70,908.94, 97,854.35 and 38,643.56

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Solution

The fourth proportional to 70,908.94, 97,854.35 and 38,643.56 is: 53,328.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,908.94 : 97,854.35 = 38,643.56 : x
  2. Step 2: Convert to fraction form
    70,908.94/97,854.35 = 38,643.56/x
  3. Step 3: Cross multiply
    70,908.94x = 97,854.35 × 38,643.56
  4. Step 4: Simplify right side
    70,908.94x = 3,781,440,447.51
  5. Step 5: Solve for x
    x = 3,781,440,447.51/70,908.94
  6. Step 6: Final answer
    x = 53,328.12

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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.