Home / 157,985.15-218,018.10-86,364.95

Finding the Fourth Proportional to 157,985.15, 218,018.10 and 86,364.95

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Solution

The fourth proportional to 157,985.15, 218,018.10 and 86,364.95 is: 119,182.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,985.15 : 218,018.10 = 86,364.95 : x
  2. Step 2: Convert to fraction form
    157,985.15/218,018.10 = 86,364.95/x
  3. Step 3: Cross multiply
    157,985.15x = 218,018.10 × 86,364.95
  4. Step 4: Simplify right side
    157,985.15x = 18,829,121,215.50
  5. Step 5: Solve for x
    x = 18,829,121,215.50/157,985.15
  6. Step 6: Final answer
    x = 119,182.86

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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.