Home / 78,985.16-108,981.96-45,451.16

Finding the Fourth Proportional to 78,985.16, 108,981.96 and 45,451.16

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Solution

The fourth proportional to 78,985.16, 108,981.96 and 45,451.16 is: 62,712.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,985.16 : 108,981.96 = 45,451.16 : x
  2. Step 2: Convert to fraction form
    78,985.16/108,981.96 = 45,451.16/x
  3. Step 3: Cross multiply
    78,985.16x = 108,981.96 × 45,451.16
  4. Step 4: Simplify right side
    78,985.16x = 4,953,356,501.07
  5. Step 5: Solve for x
    x = 4,953,356,501.07/78,985.16
  6. Step 6: Final answer
    x = 62,712.50

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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.