Home / 70,931.12-97,890.80-39,106.24

Finding the Fourth Proportional to 70,931.12, 97,890.80 and 39,106.24

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Solution

The fourth proportional to 70,931.12, 97,890.80 and 39,106.24 is: 53,969.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,931.12 : 97,890.80 = 39,106.24 : x
  2. Step 2: Convert to fraction form
    70,931.12/97,890.80 = 39,106.24/x
  3. Step 3: Cross multiply
    70,931.12x = 97,890.80 × 39,106.24
  4. Step 4: Simplify right side
    70,931.12x = 3,828,141,118.59
  5. Step 5: Solve for x
    x = 3,828,141,118.59/70,931.12
  6. Step 6: Final answer
    x = 53,969.84

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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.