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Finding the Fourth Proportional to 103,430.80, 155,000.40 and 63,870.40

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Solution

The fourth proportional to 103,430.80, 155,000.40 and 63,870.40 is: 95,715.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.80 : 155,000.40 = 63,870.40 : x
  2. Step 2: Convert to fraction form
    103,430.80/155,000.40 = 63,870.40/x
  3. Step 3: Cross multiply
    103,430.80x = 155,000.40 × 63,870.40
  4. Step 4: Simplify right side
    103,430.80x = 9,899,937,548.16
  5. Step 5: Solve for x
    x = 9,899,937,548.16/103,430.80
  6. Step 6: Final answer
    x = 95,715.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.