Home / 97,715.90-134,663.65-78,312.77

Finding the Fourth Proportional to 97,715.90, 134,663.65 and 78,312.77

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Solution

The fourth proportional to 97,715.90, 134,663.65 and 78,312.77 is: 107,923.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,715.90 : 134,663.65 = 78,312.77 : x
  2. Step 2: Convert to fraction form
    97,715.90/134,663.65 = 78,312.77/x
  3. Step 3: Cross multiply
    97,715.90x = 134,663.65 × 78,312.77
  4. Step 4: Simplify right side
    97,715.90x = 10,545,883,085.70
  5. Step 5: Solve for x
    x = 10,545,883,085.70/97,715.90
  6. Step 6: Final answer
    x = 107,923.92

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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.