Home / 112,421.13-155,156.98-71,572.20

Finding the Fourth Proportional to 112,421.13, 155,156.98 and 71,572.20

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Solution

The fourth proportional to 112,421.13, 155,156.98 and 71,572.20 is: 98,779.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,421.13 : 155,156.98 = 71,572.20 : x
  2. Step 2: Convert to fraction form
    112,421.13/155,156.98 = 71,572.20/x
  3. Step 3: Cross multiply
    112,421.13x = 155,156.98 × 71,572.20
  4. Step 4: Simplify right side
    112,421.13x = 11,104,926,717.40
  5. Step 5: Solve for x
    x = 11,104,926,717.40/112,421.13
  6. Step 6: Final answer
    x = 98,779.72

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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.