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Finding the Fourth Proportional to 70,642.68, 97,434.48 and 66,412.12

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Solution

The fourth proportional to 70,642.68, 97,434.48 and 66,412.12 is: 91,599.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,642.68 : 97,434.48 = 66,412.12 : x
  2. Step 2: Convert to fraction form
    70,642.68/97,434.48 = 66,412.12/x
  3. Step 3: Cross multiply
    70,642.68x = 97,434.48 × 66,412.12
  4. Step 4: Simplify right side
    70,642.68x = 6,470,830,377.90
  5. Step 5: Solve for x
    x = 6,470,830,377.90/70,642.68
  6. Step 6: Final answer
    x = 91,599.45

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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.