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Finding the Fourth Proportional to 70,611.51, 97,448.65 and 38,780.74

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Solution

The fourth proportional to 70,611.51, 97,448.65 and 38,780.74 is: 53,520.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,611.51 : 97,448.65 = 38,780.74 : x
  2. Step 2: Convert to fraction form
    70,611.51/97,448.65 = 38,780.74/x
  3. Step 3: Cross multiply
    70,611.51x = 97,448.65 × 38,780.74
  4. Step 4: Simplify right side
    70,611.51x = 3,779,130,271.76
  5. Step 5: Solve for x
    x = 3,779,130,271.76/70,611.51
  6. Step 6: Final answer
    x = 53,520.03

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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.