Home / 98,881.50-136,456.47-56,439.12

Finding the Fourth Proportional to 98,881.50, 136,456.47 and 56,439.12

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Solution

The fourth proportional to 98,881.50, 136,456.47 and 56,439.12 is: 77,885.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,881.50 : 136,456.47 = 56,439.12 : x
  2. Step 2: Convert to fraction form
    98,881.50/136,456.47 = 56,439.12/x
  3. Step 3: Cross multiply
    98,881.50x = 136,456.47 × 56,439.12
  4. Step 4: Simplify right side
    98,881.50x = 7,701,483,085.11
  5. Step 5: Solve for x
    x = 7,701,483,085.11/98,881.50
  6. Step 6: Final answer
    x = 77,885.99

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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.