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Finding the Fourth Proportional to 70,908.95, 97,854.36 and 38,643.57

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Solution

The fourth proportional to 70,908.95, 97,854.36 and 38,643.57 is: 53,328.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,908.95 : 97,854.36 = 38,643.57 : x
  2. Step 2: Convert to fraction form
    70,908.95/97,854.36 = 38,643.57/x
  3. Step 3: Cross multiply
    70,908.95x = 97,854.36 × 38,643.57
  4. Step 4: Simplify right side
    70,908.95x = 3,781,441,617.25
  5. Step 5: Solve for x
    x = 3,781,441,617.25/70,908.95
  6. Step 6: Final answer
    x = 53,328.13

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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.