Home / 86,897.12-130,125.09-72,820.13

Finding the Fourth Proportional to 86,897.12, 130,125.09 and 72,820.13

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Solution

The fourth proportional to 86,897.12, 130,125.09 and 72,820.13 is: 109,045.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,897.12 : 130,125.09 = 72,820.13 : x
  2. Step 2: Convert to fraction form
    86,897.12/130,125.09 = 72,820.13/x
  3. Step 3: Cross multiply
    86,897.12x = 130,125.09 × 72,820.13
  4. Step 4: Simplify right side
    86,897.12x = 9,475,725,970.06
  5. Step 5: Solve for x
    x = 9,475,725,970.06/86,897.12
  6. Step 6: Final answer
    x = 109,045.34

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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.