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Finding the Fourth Proportional to 86,701.20, 130,051.80 and 42,414.45

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Solution

The fourth proportional to 86,701.20, 130,051.80 and 42,414.45 is: 63,621.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,701.20 : 130,051.80 = 42,414.45 : x
  2. Step 2: Convert to fraction form
    86,701.20/130,051.80 = 42,414.45/x
  3. Step 3: Cross multiply
    86,701.20x = 130,051.80 × 42,414.45
  4. Step 4: Simplify right side
    86,701.20x = 5,516,075,568.51
  5. Step 5: Solve for x
    x = 5,516,075,568.51/86,701.20
  6. Step 6: Final answer
    x = 63,621.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.