Home / 98,870.50-136,441.29-56,428.12

Finding the Fourth Proportional to 98,870.50, 136,441.29 and 56,428.12

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Solution

The fourth proportional to 98,870.50, 136,441.29 and 56,428.12 is: 77,870.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,870.50 : 136,441.29 = 56,428.12 : x
  2. Step 2: Convert to fraction form
    98,870.50/136,441.29 = 56,428.12/x
  3. Step 3: Cross multiply
    98,870.50x = 136,441.29 × 56,428.12
  4. Step 4: Simplify right side
    98,870.50x = 7,699,125,485.07
  5. Step 5: Solve for x
    x = 7,699,125,485.07/98,870.50
  6. Step 6: Final answer
    x = 77,870.81

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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.