Home / 86,547.15-129,820.73-76,870.35

Finding the Fourth Proportional to 86,547.15, 129,820.73 and 76,870.35

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Solution

The fourth proportional to 86,547.15, 129,820.73 and 76,870.35 is: 115,305.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,547.15 : 129,820.73 = 76,870.35 : x
  2. Step 2: Convert to fraction form
    86,547.15/129,820.73 = 76,870.35/x
  3. Step 3: Cross multiply
    86,547.15x = 129,820.73 × 76,870.35
  4. Step 4: Simplify right side
    86,547.15x = 9,979,364,568.00
  5. Step 5: Solve for x
    x = 9,979,364,568.00/86,547.15
  6. Step 6: Final answer
    x = 115,305.53

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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.